1. PRESENT PERFECT TENSE
POSITIVE SENTENCE
FORMULA:
Subject + Have/Has +
Verb 3.
Example:
1. I have taught English
2.You have taught
English
3.He has taught English
4.She has taught
English
NEGATIVE SENTENCE
FORMULA:
Subject + Have/has +
NOT + Verb 3
Example:
1. I have not taught
English
2. We haven't taught
English
3.He hasn't taught
English
4.She hasn't taught
English
INTEROGATIVE
SENTENSE
FORMULA:
Have/has + subject +
Verb 3
Example:
1.Have I taught English?
2.Has he taught
English?
3.Has she taught
English?