Chia động từ trong ngoặc ra thì quá khứ đớn và hiện tại hoàn thành:
1) We (studied) .......... a very hard lesson the day before yesterday.............
2) We (have studied) ................. almost every lesson in this book so far............
3) We (have never watched) ................. that television program..............
4) We (watched) ............ an interesting program on television last night........
5) My wife and I (had travelled)................... by air many times in the past
6) My wife and I (travelled) .................... to Mexico by air last summer
7) I (have read)............... that novel by Hemingway sevaral times before
8) I (read)............... that novel again during my last vacation
9) I (had)................ a little trouble with my car last week
10) However, I (have)................... no trouble with my car since then
- Giúp với , chả phân biệt đc thì nào mầ chia 
1) We (studied) studied a very hard lesson the day before yesterday
2) We (have studied) have studied almost every lesson in this book so far
3) We (have never watched) have never watched that television program
4) We (watched)watched an interesting program on television last night
5) My wife and I (had travelled) had travelled by air many times in the past
6) My wife and I (travelled) travelled to Mexico by air last summer
7) I (have read)have read that novel by Hemingway sevaral times before
8) I (read) read that novel again during my last vacation
9) I (had). had a little trouble with my car last week
10) However, I (have) have no trouble with my car since then
Chúc bạn học tốt 
Mk giúp bn nhận dạng nhé!
Dấu hiệu nhận biết thì QKĐTrong câu có các trạng từ chỉ thời gian trong quá khứ:
- yesterday (hôm qua)
- last night/ last week/ last month/ last year: tối qua/ tuần trước/ tháng trước/ năm ngoái
- ago: Cách đây. (two hours ago: cách đây 2 giờ/ two weeks ago: cách đây 2 ngày …)
- when: khi (trong câu kể)
Dấu hiệu nhận biết THTHT trong tiếng AnhTrong câu thường có các từ: just, recently, lately: gần đây, vừa mới
already: rồi
before: trước đây
ever: đã từng
never: chưa từng, không bao giờ
1) We (studied) .........studied........... a very hard lesson the day before yesterday
2) We (have studied) .....have studied............ almost every lesson in this book so far
3) We (have never watched) ........have never watched..... that television program
4) We (watched)..watched............ an interesting program on television last night
5) My wife and I (had travelled) ......had travelled............ by air many times in the past
6) My wife and I (travelled) .......travelled........... to Mexico by air last summer
7) I (have read).....have read............ that novel by Hemingway sevaral times before
8) I (read)...... read ....that novel again during my last vacation
9) I (had).......... had....... a little trouble with my car last week
10) However, I (have) ..........have ...........no trouble with my car since then
