Answer:

Past tense

1. Watched

2. Laughed

3. Listened

4. Acquainted

5. Reflected

Present tense

1. Watching

2. Laughing

3. Listening

4. Acquainting

5. Reflecting

Future tense

1. will watch

2. will laugh

3. will listen or shall listen

4. will acquaint or shall acquaint

5. will reflect or shall reflect