I. Viết lại câu không thay đổi nghĩa: 1) This is the first time he went abroad. => He hasn't................................................................................................. 2) She started driving 1 month ago. => She has.................................................................................................... 3) We began eating when it started to rain. => We have................................................................................................... 4) I last had my hair cut when I left her. => I haven't.................................................................................................... 5) The last time she kissed me was 5 months ago. => She hasn't................................................................................................. 6) It is a long time since we last met. => We haven't................................................................................................ 7) When did you have it ? => How long .................................................................................................? 8) This is the first time I had such a delicious meal . => I haven't.................................................................................................. 9) I haven't seen him for 8 days. => The last .................................................................................................. 10) I haven't taken a bath since Monday. => It is ......................................................................................................... 11) Samuel started keeping a diary in 1997 Samuel has ___________________________________ 12)We started learning English fìve years ago. We …………………………………………………………………………………………………

`1` He hasn't gone abroad before.

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` This is the first time + S + has / have + V3/_ed

`=` I have / has never + V3_ed + before.

`2` She has driven for 1 month.

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` S + began / started + to V /Ving + (time) ago

`=` S + have / has + V3/_ed / been Vimg + for (time)

`3` We have eaten since it started to rain.

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` S + began / started + to V /Ving + (time) ago

`=` S + have / has + V3/_ed / been Vimg + for (time)

`4`   I haven't my hair cut since/for I left her.

`5` She hasn't met me for 5 months.

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` The last time + S + V2/ ed+ was + time + ago

`=` S + have/ has +not + for/since + time

`6` We have not met for a long time.

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` It’s + time+ since + S + last + Ved

`=` S + have/ has +not + for/since + time

`7` How long have you had it?

`⇒`  When + did + S + V_inf + ... ?

`=` How long + have/has + S + V2/ ed + ...?

`8` I have not had such a delicious meal before

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` This is the first time + S + has / have + V3/_ed

`=` I have / has never + V3_ed + before

`9` The last time I saw him was 8 days ago.

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` The last time + S + V2/ ed+ was + time + ago

`=` S + have/ has +not + for/since + time

`10` It is Monday since I last took a bath.

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` S + have/ has +not + for/since + time

`=` It’s + time+ since + S + last + Ved

`11` Samuel has kept a diary since 1997.

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` S + began / started + to V /Ving + (time) ago

`=` S + have / has + (not) + for/ since + time

`12` We have learnt English for five years.

`-` Cấu trúc biến đổi giữa HTHT và QKĐ

`⇒` S + began / started + to V /Ving + (time) ago

`=` S + have / has + V3/_ed / been Vimg + for (time)

`1.` He hasn’t gone to abroad before.

`-` This is the first time + S + Ved/Vp2 + ...

= S + have/has + not + Ved/Vp2 + before

`2.` She has driven for a months.

`-` S + started/began + Ving + time + ago

= S + have/has + Ved/Vp2 + since/for

`3.` We have been eating since it started rain.

`-` S + started/began + Ving ( bắt đầu làm gì )

= S + have/has + been + Ved/Vp2 + since/for ( since + mốc thời gian, for + khoảng thời gian )

`4.` I haven’t had my hair cut since I left her.

`5.` She hasn’t kissed me for 5 months.

`-` The last time + S + Ved/V2 + was + time + ago ( lần cuối cùng làm gì )

= S + have/has + not + Ved/Vp2 + since/for

`6.` We haven't met for a long time.

`-` It is + time + since + S + last + Ved/V2

= S + have/has + not + Ved/Vp2 + since/for

`7.` How long have you had it ?

`-` When + did + S + Vinf + ... ?

= How long + have/has + S + Ved/Vp2 + ... ?

`8.` I haven't had such a delicious meal before.

`-` This is the first time + S + Ved/Vp2 + ...

= S + have/has + not + Ved/Vp2 + before

`9.` The last time I saw him was 8 days ago.

`10.` It is Monday since I last took a bath.

`-` S + have/has + not + Ved/Vp2 + since/for

= It is + time + since + S + last + Ved/V2 ( kể từ lần cuối làm gì )

`11.` Samuel has kept a diary since 1997.

`-` started/began + Ving `=` have/has + Ved/Vp2 + since/for

`12.` We have learnt English for five years.

`-` started/began + Ving + time + ago `=` have/has + Ved/Vp2 + since/for