Verb - to do
This is a strange verb. You can 'do' homework, washing-up, make-up, crossword and other things. All of them 'look' different.
Homework
Washing-up
Make-up
Nothing
Present tense - do
'Do' is very useful verb to use in a question because it is a general verb to get to a specific verb. For example:
A: What are you doing?
B1: I'm doing my homework.
B2: I am doing the washing-up.
B3: I'm having dinner.
Let's break it down.
Subject + present tense verb + noun / noun phrase
She does her homework.
I do my homework.
He does his homework.
You do your homework.
It does its homework.
Note that the subjects (he, she and it) change the verb so there is an 'es' at the end.
Conversation:
A: What does she do every night?
B: She does her homework.
Past tense - did
Let's break it down.
Subject + past tense verb + noun / noun phrase
She did the washing-up.
I did the washing-up
He did the washing-up.
You did the washing-up.
It did the washing-up.
They did the washing-up.
Conversation:
A: What did they do last week?
B: They did all their homework.
Continuous tense - doing
Let's break it down.
Subject + verb 'be' + continuous verb + noun / noun phrase
We are doing nothing.
I am doing nothing.
She is doing nothing.
He is doing nothing.
You are doing nothing.
It is doing nothing.
They are doing nothing.
Conversation:
A: What are you doing?
B: I'm doing the housework.
A: Are you doing anything special?
B: Not really. I'm doing the dishes.
A: What is your sister doing?
B: She is doing her make-up.