Cấu trúc thì quá khứ đơn với tobe

` ( + ) ` :S + was / were + ...

` - ` Chủ ngữ là I / he / she / it + was + ...

` - ` Chủ ngữ là You / we / they + were + ....

` ( - ) ` : S + was / were + not + ...

` - ` Chủ ngữ là I / he / she / it + was + not +  ...

` - ` Chủ ngữ là You / we / they + were + not + ....

` ( ? ) ` : Was / Were + S + ... ?

` - ` Wasn't ` = ` Was not . Weren't ` = ` Were not

` 1 ` : was

` 2 `: were

` 3 ` : was

` 4 ` : were

` 5  ` : was

` 6 ` : was

` 7 ` : were

` 8 `: was

` 9 ` : was

` 10 ` : were

` 11 `: were

` 12 `: were

` 13 ` : was

` 14 `: was

` 15 ` : were

1. was vì the teacher là số ít

2.were vì the sudents là số nhiều

3.was vì one student là số ít

4.were vì We là số nhiều

5.was vì he là số ít

6.was vì I là số ít

7.were vì We là số nhiều

8.was vì Tina là tên người : số ít

9.was vì he là số ít

10.were vì Robert and Stan là số nhiều

11.were vì you là số nhiều

12.were vìThey là số nhiều

13.was vì I là số ít

14.was VÌ she là số ít

15.were vì Jessica and Kimberly là số nhiều