Ответ:
1. Tom was with his girlfriend last week .
2. She has already done all the exercises.
3. My aunt was married last year. She had a very big wedding.
4. You have not sent me that important email yet.
5. Erin introduced me to her friend Max yesterday.
6. I have not eaten dinner yet
Explanation:
-Past Simple-
pattern :
verbal sentences
(+) Subject + verb 2 + object
(-) Subject + did + not + verb 1 + object
(?) Did + subject + verb 1 + object + ?
nominal sentences
(+) Subject + was/were + complement
(-) Subject + was/were + not + complement
(?) Was/were + subject + complement + ?
×Subject×
Was >>> He, she, it
Were >>> I, you, we, they
-Present Perfect-
pattern :
(+) Subject + has/have + verb 3
(-) Subject + has/have + not + verb 3
(?) Has/have + subject + verb 3
hope it helps