Present Perfect

1. Affirmative

1.1. S + have/has + past participle

1.2. EXAMPLE:

1.3. I have tried sushi before.

2. Negative

2.1. S + have/has + not + participle

2.2. EXAMPLE:

2.3. I have not tied sushi before

3. Interrogative

3.1. Have/has + S + past participle

3.2. EXAMPLE:

3.3. Have you tried sushi before?