I. Past Simple Tense
1. Saw
2. Was
3. Did he go ...?
4. Didn't watch
5. Lived
II. Past Continuous Tense
1. Were traveling
2. Were watching
3. Weren't eating
4. Wasn't drinking
5. Were you listening ...?
III. Present Simple Tense
1. Go
2. Visit
3. Do you play ...?
4. Works
5. Swim
IV. Present Continuous Tense
1. Are playing
2. Isn't drinking
3. Is doing
4. Is Ryan playing ...?
5. Is watching
Học tốt. Nocopy.