Answer:
pasttense. present tense
1. watched. 1. watching
2. laughed. 2. laughing
3. listened. 3. listening
4. reflected. 4. reflecting
5. acquinted. 5. acquainting
Explanation:
Future tense
1. s(he)(we) will watch
2. will laugh
3. s(he)/we/i will laugh
4.i will/ shall reflect
you/we/ they /will/shall have reflected
5. i/you/he/she/it will acquaint