Building Bigger Sentences & Words

Today: Learn how to build complex sentences using clauses, form new words using prefixes and suffixes, use phrasal verbs, and understand when to use formal or informal language.
Retrieval

What Do You Already Know?

Think about these examples (just listen, don't answer yet):

"I studied because I wanted to pass."
"After finishing work, I went home."
"uncomfortable" (un- + comfortable)
"look up" (phrasal verb meaning: search)

Have you seen patterns like these before?

🎙 Speak: What do you notice about how these sentences and words are built?

Hook

Why This Matters

These structures let you build bigger, more interesting sentences. Instead of simple sentences ("I studied. I passed."), you can say "I studied because I wanted to pass." Instead of using the same 1000 words, you can create thousands more by learning prefixes and suffixes.

And phrasal verbs? They're everywhere in English. "Look up", "look after", "look forward to" — same verb, completely different meanings. You need to know them.

Let's build these skills so your English becomes more sophisticated and natural.

Map

What We're Covering Today

Complex Sentences: Clauses That Connect Ideas

A complex sentence links two or more ideas. The connectors tell you HOW they relate.

I Do — Teacher Models

Time Clauses: When, Before, After, While, Until

When I woke up, it was raining.
Before I leave, I'll lock the door.
After she finished, she felt proud.
While he was studying, his sister was cooking.
Until you arrive, I'll wait here.

Reason Clauses: Because, As, Since

Because it was cold, we stayed inside.
As I was busy, I couldn't call you.
Since you're here, let's start the meeting.

Result Clauses: So, As a result, Therefore

It was raining, so we cancelled the picnic.
She trained hard, therefore she won the race.
As a result, the team was disappointed.

Comma rule: When the dependent clause comes FIRST, use a comma: "When I woke up, I felt tired." When it comes second: "I felt tired when I woke up" — no comma.

We Do — Spot the Structure

What's the Relationship?

"I went to bed early because I was exhausted." Click to discuss

Reason clause: "because I was exhausted" explains WHY I went to bed early.

"After she left, the house felt empty." Click to discuss

Time clause: "After she left" tells us WHEN the house felt empty.

"It was late, so we went home." Click to discuss

Result clause: "so we went home" shows the RESULT or CONSEQUENCE of it being late.

🎙 Speak: Pick one sentence. Tell me: is it time, reason, or result?

You Do — Build Your Own

Create Three Complex Sentences

1. A time clause: "When/Before/After... [your sentence]"

Example: "After finishing breakfast, I check my emails."

2. A reason clause: "[Something] because... [your reason]"

Example: "I'm learning English because I want to travel."

3. A result clause: "[Situation], so... [result]"

Example: "The weather was beautiful, so we went to the beach."

🎙 Speak: Tell me your three sentences.

Word Formation: Build New Words

You don't have to memorise all English words. Learn roots + prefixes/suffixes, and you can create thousands.

I Do — Noun Suffixes

Common Noun-Building Suffixes

-ment (action, result):

develop → development
agree → agreement
achieve → achievement

-ness (quality):

happy → happiness
kind → kindness
dark → darkness

-ity (quality, state):

possible → possibility
responsible → responsibility
creative → creativity

-ance / -ence (quality, action):

important → importance
different → difference
confident → confidence
I Do — Adjective & Verb Suffixes

More Building Blocks

-able/-ible (can be done):

use → usable
comfort → comfortable
possible → impossible

-ous (full of):

danger → dangerous
glory → glorious
humor → humorous

-ive (having quality of):

create → creative
produce → productive
attract → attractive

-al (relating to):

person → personal
nation → national
emotion → emotional

Negative prefixes: un-, in-/im-/ir-/il-, dis-, mis-

I Do — Negative Prefixes

Making Words Negative

un- (most common):

happy → unhappy
lucky → unlucky
comfortable → uncomfortable

in-/im-/ir-/il- (before certain letters):

possible → impossible (im- before 'm')
responsible → irresponsible (ir- before 'r')
legal → illegal (il- before 'l')

dis- (not, opposite):

agree → disagree
honest → dishonest
appear → disappear

mis- (wrongly):

understand → misunderstand
spell → misspell
behave → misbehave
We Do — Word Spot

Break Down These Words

What does "irresponsible" mean? Click to see

ir- (negative) + responsible = not responsible. When you see ir- before an 'r' word, it means the opposite.

What does "achievement" mean? Click to see

achieve + -ment = the action or result of achieving something. Success or accomplishment.

What does "unforgettable" mean? Click to see

un- (not) + forget + -able (can be) = cannot be forgotten. Memorable.

🎙 Speak: Pick one word. Explain: what's the root, what does each part mean?

You Do — Word Building

Create Five New Words

For each root word, add a prefix or suffix to make a new word. Say it out loud:

1. possible + prefix:

Example: impossible

2. happy + suffix:

Example: happiness

3. create + suffix:

Example: creative

4. agree + prefix:

Example: disagree

5. care + prefix:

Example: careless or uncaring

🎙 Speak: Tell me your five words. Say each one clearly.

Phrasal Verbs: Verbs + Particles with New Meanings

A phrasal verb = verb + preposition/adverb. The meaning changes. "Put" alone is different from "put up with", "put off", "put up".

I Do — Common Phrasal Verbs

Two-Word Phrasal Verbs

Phrasal Verb Meaning & Example
look up Find information (in a dictionary, online). "I looked up the word."
look after Take care of. "She looks after her younger sister."
look forward to Anticipate with pleasure. "I look forward to seeing you."
put up with Tolerate, endure. "I can't put up with this noise."
put off Postpone, delay. "Don't put off your homework."
put on Wear, dress in. "Put on your coat."
give up Stop trying, surrender. "Don't give up on your dreams."
give in Surrender, concede. "He finally gave in."
run into Meet someone by chance. "I ran into an old friend."
run out of Have none left. "We ran out of milk."
get on with Have a good relationship with. "I get on well with my colleagues."
get through Complete, finish something difficult. "I got through the exam."
take up Start a hobby or activity. "She took up painting."
take off Remove, or (plane) depart. "He took off his jacket."
turn down Reject, refuse. "She turned down the job offer."
turn up Arrive, appear. "Where were you? I turned up at 5pm."

Three-Word Phrasal Verbs

look forward to: I look forward to the weekend.
put up with: I can't put up with his behaviour.
get on with: I get on well with my boss.
run out of: We ran out of time.
We Do — Match & Discuss

What's the Meaning?

"She gave up smoking." Click to see

Give up = stop doing something / surrender. She stopped smoking.

"I ran into my teacher at the supermarket." Click to see

Run into = meet by chance. I met my teacher unexpectedly.

"I can't put up with this situation anymore." Click to see

Put up with = tolerate, endure. I can't accept or stand this anymore.

🎙 Speak: Pick one phrasal verb from the table and create your own sentence with it.

You Do — Speak Sentences

Use Three Phrasal Verbs

Create a real sentence using each phrasal verb:

1. "look forward to":

Example: "I look forward to the summer holidays."

2. "give up":

Example: "I will never give up on my goals."

3. "run out of":

Example: "I always run out of coffee by Wednesday."

🎙 Speak: Tell me your sentences. Be specific about your life.

Punctuation & Tone: Commas and Formality

How you write changes the meaning. Commas matter. So does tone: formal or informal?

I Do — Comma Rules

When to Use Commas in Complex Sentences

Rule 1: Dependent clause FIRST = use comma

After we ate lunch, we went for a walk.
Because it was raining, we stayed inside.
If you finish early, you can go home.

Rule 2: Dependent clause LAST = usually no comma

We went for a walk after we ate lunch.
We stayed inside because it was raining.
You can go home if you finish early.

Rule 3: Lists = commas between items

I bought apples, oranges, and bananas.

Rule 4: Introductory phrases = comma

However, I disagree.
On the other hand, she has a point.
First, let me explain.

Remember: Commas separate ideas. They show readers where to pause.

I Do — Formal vs. Informal

Register: Know Your Audience

Formal (Email, Report, Interview) Informal (Text, Chat, Friends)
"I would like to inquire about..." "Hey, can you tell me about...?"
"With regard to your suggestion, I believe..." "About your idea — I think..."
"I shall provide the information at my earliest convenience." "I'll send it ASAP."
"It is imperative that we address this matter." "We need to sort this out."
"Furthermore, the data suggests..." "Also, the info shows..."
No contractions: "I will", "it is" Contractions: "I'll", "it's"
Complex sentence structure Simple, direct sentences
Advanced vocabulary Common, everyday words

When to Use Each

We Do — Spot the Register

Which Tone Is This?

"I sincerely appreciate your kind attention to this matter." Click to see

Formal. "Sincerely", "appreciate", "kind attention" — these are formal words and structures.

"Hey! Whatcha up to? Let's grab coffee later!" Click to see

Informal. "Hey", "Whatcha", "grab" — casual, friendly language.

🎙 Speak: Tell me: when would you use formal English? When would you use informal?

You Do — Rewrite for Register

Make This More Formal

Original (Informal): "Hi! I'm really sorry, but I can't come to the meeting tomorrow. Stuff came up."

🎙 Speak: Rewrite this as a formal email. Make it professional.

Put It All Together — Mixed Challenge

Now you'll use complex sentences, word formation, phrasal verbs, and appropriate tone.

Challenge 1: Complex Sentence

Complete This Sentence

Finish this complex sentence about your life:

"After [time clause], I decided to [infinitive] because [reason]."

Example: "After finishing my degree, I decided to travel because I wanted adventure."

🎙 Speak: Tell me your sentence.

Challenge 2: Word Formation

Build a Word & Use It

Take the word "develop". Create a noun using -ment. Now use it in a sentence:

Example: "The development of this project took six months."

🎙 Speak: Create your sentence with your formed word.

Challenge 3: Phrasal Verb Sentence

Use "Look Forward To" or "Run Out Of"

Choose one phrasal verb and make a sentence about your future plans:

Example: "I look forward to finishing this course and celebrating."

🎙 Speak: Tell me your sentence.

Challenge 4: Register

Write Both Versions

Formal version: Write a sentence requesting help with a work project.

Example: "I would appreciate your assistance with this project when you have availability."

Informal version: Write the same idea as a text to a friend.

Example: "Hey! Can you help me with this project when you're free?"

🎙 Speak: Say both versions out loud. Notice the difference.

What You Can Do Now

I can...

...use complex sentences with time, reason, and result clauses; build new words with prefixes and suffixes; use phrasal verbs correctly; and match my tone to my audience (formal or informal).

Recall Zone

Memory Check: Quick Questions

No notes. Answer from memory. Speak out loud.

1. Name the four types of word formation we studied today.

Check your answer Click to reveal

Noun suffixes (-ment, -ness, -ity, -ance/-ence), adjective/verb suffixes (-able, -ous, -ive, -al), negative prefixes (un-, dis-, in-/im-/ir-/il-, mis-), and phrasal verbs.

2. When do you use a comma in a complex sentence?

Check your answer Click to reveal

When the dependent clause comes FIRST. "After I finished, I went home." When it comes second: "I went home after I finished" — no comma.

3. What does "put up with" mean?

Check your answer Click to reveal

Tolerate, endure, accept something unpleasant. "I can't put up with this noise."

4. What prefix means "opposite" or "not"?

Check your answer Click to reveal

un-, dis-, mis-, in-/im-/ir-/il- (depending on the root word)

Reflection

What Was Most Useful?

Which part of today's lesson will actually help your English the most?

🔗
Complex Sentences
Now I can connect ideas with reason & time clauses
🔤
Word Formation
I can create new words from roots I already know
🎭
Phrasal Verbs
Understanding phrasal verbs makes real English clearer
🎯
Formal vs. Informal
I now know when to use formal or casual language

🎙 Speak: Pick one. Explain how you'll use it in real English.

Final Challenge

🎙 Speak: Tell me about a goal you have, using: a complex sentence with "because", a word you formed with a prefix/suffix, and a phrasal verb. Make it real.