2 when đi dyou live in London
-> thì QKĐ
-> sau did + v nguyên mẫu
3 It is 20 years since Tom and Mary moved to Paris.
-> sau since + thì QKĐ
4 I have never seen that play before
-> thì HTHT
5 It's 5 years since we visited Kuala Lumpur.
-> sau since + thì QKĐ
6 I have read that book since September 20th.
->thì HTHT
7 This is the first time I have played a computer game.
-> thì HTHT
8 We have washed this car since 8 this morning.
-> thì HTHT
9 This is the first time he has played chess.
-> thì HTHT
10 We have lived here for 15 years.
-> thì HTHT
11 I haven't spoken to her for three years.
-> thì HTHT
12 She has learnt English for 8 months.
-> thì HTHT
13 We haven't visited Kuala Lumpur for 5 years.
-> thì HTHT
14 They have worked for the enterprise since 2002.
-> thì HTHT
15 haven't read a book since September 20 TH
-> thì HTHT
16 Minh has collected stamps since 2000.
-> thì HTHT '
17 She hasn't visited me for five months.
-> thì HTHT
=
18 an has cared about healthy eating for 3 years.
-> thì HTHT
19 It hasn't rained here for a fortnight.
-> thì HTHT
20 she has never faced with difficult problem before.
-> thì HTHT