be
was/were
eat
ate
I eat sweets today.
I ate sweets yesterday.
I ate sweets yesterday.
I didn't eat sweets yesterday.
Yes, I went to school.
Did you go to school?
drink
drank
go
went
Mary drinks tea with lemon.
Mary drank tea with lemon.
Mary drank tea with lemon.
Mary didn't drink tea with lemon.
No, I didn't take medicine.
Did you take medicine?
do
did
give
gave
The weather is terrible.
The weather was terrible.
Stella had a bad headache yesterday.
Stella didn't have a bad headache yesterday.
Yes, I did my homework yesterday.
Did you do your homework?
take
took
have
had
A doctor gives me some medicine.
A doctor gave me some medicine.
A doctor gave me some medicine.
A doctor didn't give me some medicine.
No, I didn't take medicine.
Did you take medicine?
Yes, I had a headache.
Did you have a headache?