To Do — Foundation Lesson 4

1 Concept

The Verb That Makes Questions

🧱 Foundation — this verb builds almost every question and negative you'll ever say

"Do" is one of the busiest verbs in English. As a main verb it describes everyday activities — I do my homework. But its real power is as a helping verb: it is the tool English uses to build questions and negatives for almost every other verb.

Do does two completely different jobs:

Main verb — has its own meaning: I do the dishes every night.
Helping verb — builds a question or negative: Do you play tennis? / I don't play tennis.

This lesson focuses on "do" as a main verb — everyday activities. You'll meet its helping-verb job as a "question maker" at the end, and then in full detail in every Present Simple and Past Simple lesson ahead.

2 Present Forms

Do, Does

"Do" only has two present forms — far simpler than "be":

Subject	Affirmative	Subject + not + Verb	Contracted	Question
I	do	I do not	I don't	Do I...?
You	do	You do not	You don't	Do you...?
He / She / It	does	He does not	He doesn't	Does he...?
We	do	We do not	We don't	Do we...?
They	do	They do not	They don't	Do they...?

Where "not" goes: "not" goes right after "do" or "does" — never after the main verb. We say "I do not know", never "I know not."

Watch the spelling and sound. "Does" does not rhyme with "goes" or "toes." It is pronounced /ˈdʌz/, like "buzz" — not /doʊz/. This is one of the most common pronunciation mistakes for English learners.

Questions — subject and verb switch places. In a statement, the subject comes first: You play tennis. In a question, "do" jumps in front of the subject: Do you play tennis? With he/she/it, "does" takes the -s, and the main verb goes back to its base form: "Does she play" — never "Does she plays."

3 Past Forms

Did

The past is even simpler — one form for every subject:

Subject	Affirmative	Subject + not + Verb	Contracted	Question
I	did	I did not	I didn't	Did I...?
You	did	You did not	You didn't	Did you...?
He / She / It	did	He did not	He didn't	Did he...?
We	did	We did not	We didn't	Did we...?
They	did	They did not	They didn't	Did they...?

The most common mistake with "did": once "did" appears, the main verb goes back to its base form. We say "Did she call", never "Did she called." "Did" already shows the past tense, so the main verb does not need to show it again.

4 Activity Verb Uses

Everyday Activities With Do

"Do" has many different uses as a main verb — far more than we could cover in one lesson. Here are four of the most common everyday activities you will use it for.

Household Chores

I do the dishes every night.
She does the laundry on Sundays.
They did the shopping yesterday.

Work and Study Tasks

He does his homework after dinner.
We did a report last week.
I do a lot of paperwork.

General "Activity" (unspecified action)

What do you do on weekends?
She did something strange.
I didn't do anything today.

Favors and Business

Can you do me a favor?
They do business together.
She does a good job.

5 Question Maker Preview

Do + Every Other Verb = Question or Negative

"Do" also works as a helping verb — but its job is different from "be". Instead of building continuous tenses, "do" builds questions and negatives for almost every other main verb in the present and past simple.

do / does (present) Do you play tennis? She doesn't play tennis.

did (past) Did you call her? They didn't call her.

The helping verb ("do / does / did") shows the question or the negative. The main verb stays in its base form and has the meaning. You'll use this pattern in every Present Simple and Past Simple lesson ahead — it's called "do-support".

Exception: "be" never needs "do" for questions or negatives — remember from Lesson 3, "be" moves itself to the front: "Are you ready?", not "Do you be ready?"

6 Practice

Try It Yourself

Exercise A — Identify the Job

Click your answer for each sentence.

1

She does her homework every day.

✓ Correct — "does" has its own meaning here, describing an activity.
2

Do you play tennis?

✓ Correct — "do" teams up with "play" to build the question.
3

I did the shopping yesterday.

✓ Correct — "did" has its own meaning here, describing an activity.
4

She didn't call her mother.

✓ Correct — "didn't" teams up with "call" to build the negative.
5

Can you do me a favor?

✓ Correct — "do" has its own meaning here, describing an activity.
6

Does she live in Paris?

✓ Correct — "does" teams up with "live" to build the question.
7

They do the dishes every night.

✓ Correct — "do" has its own meaning here, describing a chore.
8

I don't understand this rule.

✓ Correct — "don't" teams up with "understand" to build the negative.

Exercise B — Correct Form of Do

Type the correct form: do, does, or did — the negative (don't, doesn't, didn't) may be the answer if the sentence calls for it. Read the whole sentence carefully before answering; only one form is correct.

1

I'm not sure if she can play an instrument. she play the piano?
2

He talks about it all the time, but I think he actually plays.
3

I have no idea whether you called him. you call him last night?
4

He claims to eat healthy, but he eat vegetables — I've seen him refuse them every time.
5

They promised to finish the book by Friday, but they read it in time.
6

We the dishes every night.
7

I'm not sure where they live. they live in Colombia?
8

I heard you went out yesterday. What you do?

Exercise C — Main Verb or Helping Verb?

Click your answer for each sentence.

1

He does his homework every day.

✓ Correct — "does" is a main verb here. It has its own meaning: the activity of doing homework.
2

Does she speak French?

✓ Correct — "does" is a helping verb here. It teams up with "speak" to build the question — it has no meaning of its own.
3

We did a report last week.

✓ Correct — "did" is a main verb here. It has its own meaning: the activity of doing a report.
4

I didn't read the letter.

✓ Correct — "didn't" is a helping verb here. It teams up with "read" to build the negative — it has no meaning of its own.
5

Can you do me a favor?

✓ Correct — "do" is a main verb here. It has its own meaning: the activity of doing a favor.
6

Do they live in Colombia?

✓ Correct — "do" is a helping verb here. It teams up with "live" to build the question — it has no meaning of its own.

7 Choose the Right Sentence

Apply What You Know

Read each question carefully. Select the sentence that matches the description.

Question 1 of 5

Select the sentence with the correct past tense question.

B is correct. Once "did" appears, the main verb goes back to its base form: "call", not "called" or "calls". "Did" already shows the past tense.

Question 2 of 5

Select the sentence with the correct negative.

C is correct. With he/she/it, the helping verb is "doesn't" (not "don't"), and the main verb stays in its base form: "drink", not "drinks".

Question 3 of 5

Select the sentence where "do" is used as a main verb.

B is correct. "Do" has its own meaning here — the activity of paperwork. In A, C, and D, "do/does/did" is only building a question or negative for another verb.

Question 4 of 5

Select the sentence with the correct question word order.

C is correct. "Do" moves to the very front of the question, before the subject: "Do you", not "you do". The main verb "play" stays right after the subject.

Question 5 of 5

Select the sentence that correctly forms a question with "be" — without using "do".

A is correct. "Be" never needs "do" — it moves itself to the front of the question, just like you learned in Lesson 3.

8 Summary

Do as a main verb and a question maker Do / does in the present, did in the past — used for everyday activities and for building questions and negatives.

Present: do (I/you/we/they), does (he/she/it).
Past: did — one form for every subject.
"Not" goes right after do/does/did — never after the main verb.
Main verb uses: chores, work and study tasks, general activities, favors and business.
Do-support: do/does/did builds questions and negatives for almost every other verb — the main verb stays in its base form.
Exception: "be" never needs "do" — it moves itself to the front of the question.

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