1.We studied a very hard lesson yesterday
=>DHNB của thì QKĐ
2.We have studied alomost ...so far
=>DHNB của thì HTHT
3.We have never watch that television program
=>DHNB của thì HTHT
4.He watched an interesting program television last night
=>DHNB của thì QKĐ
5.My wife and I have traveled by air many times in the past
=>DHNB của thì HTHT
6.My wife and I traveled to Mexico by air last summer
=>DHNB của thì QKĐ
7.I have read that novel by Hemingway several times before
=>DHNB của thì HTHT
8.I read that novel again during my last vacaticon
=>DHNB của thì QKĐ
GỬI BẠN!! CHÚC HỌC TỐT!!!
