Глагол to be

Compare
Present Simple
1. I am at home now.
2. Fred is happy now.
3. My friends are schoolgirls.
Past Simple
I was at home yesterday.
2. Fred was happy yesterday.
3. My friends were schoolgirls.

Глагол to be в Past Simple
I/ He/ She/ It → was
It was interesting at the party yesterday.
You/ We/ They → were
They were in the forest last night.

Compare
(+) I was at home yesterday.
(-) I was not at home yesterday.
2. (+) They were in the forest last night.
(-) They were not in the forest last night.

Negative Sentence ( - )
was + not = wasn’t
My sister wasn’t in the park.
were + not = weren’t
There weren’t so many strange people
there.

Compare
1.(+) Fred was happy yesterday.
(?) Was Fred happy yesterday?
2.(+) The children were in the zoo a week ago.
(?) Were the children in the zoo a week ago?

Interrogative Sentence (?)
Cтруктура вопроса
Was/ Were + П + …? Cтруктура ответа
(+) Yes, П + was/ were.
(-) No, П + wasn’t/ weren’t.
It was interesting at the party yesterday.
2. They were in the forest last night.

Interrogative Sentence (special question) (?)
1. (+) He was in Moscow last year.
(?) Where was he last year?
2. (+) My friends were at school in the morning.
(?) When were my friends at school?