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1. when (1) When I _(到达机场), the guests had left. When they heard the news, they jumped with joy. = When _ the news, they jumped with joy. = While _ the news, they jumped with joy. When the medicine is taken with water, it works better. = When/ while _ with water, it works better. (2) I was about to go out _ it began to rain. They were watching TV _ suddenly the lights went out. We had just settled down _someone knocked at the door. 2. while (1) Mother was washing clothes _ father was reading. The aim of the campaign is to provide a center for monkeys _ educating the public. (2) While (= _) the sun is shining, it isnt very warm.,when I got to the airport,hearing,hearing,taken,when,when,when,while,while,Althouth,1,3. as (1) _ autumn approaches, leaves began to turn yellow. = _ autumn approaching, leaves began to turn yellow. (2)The growth of regifting is more and more common _ people find it difficult to make ends meet to a great degree. (3) _ is known to us all, he is an artist. _ is known to us all is that he is an artist. _ is known to us all that he is an artist. (4) This trend, which was started by the medical community （医学界） a method of fighting heart disease, has had some unintended(无意识的) side effects.,As,With,As,What,It,as,as/because,2,4. since (1) It is/ has been three years since the war _ (break) out. We _ (not see) each other since I came here. (2) _we have no money, we cant buy that coat. 5. before (1) Please write it down _ you forget it. (2) He had rushed out of the room _ I could offer my thanks. (3) It was nearly a year _ I came back. (4) It will be a long time _ we meet again. 拓展： (1) Its two years _ I came here. (2) It was eight oclock _ he came back. (3) It was on the morning _ the earthquake broke out. (4) It will be three years _ he returns from abroad.,broke,havent seen,Since,before,before,before,before,since,when,that,before,3,6. 一.就. (1) the moment/ the minute/ the second/ the instant. _ (我一到家), it began to rain. (2) immediately/ directly/ instantly. Children ran out _ the bell rang. (ring) (3) hardly/ scarcely when; no sooner. than. I had hardly arrived home _ it began to rain. (4) on doing I began to do my homework on _ (arrive) home. I began to do my homework on my _ (arrive). (The aim of the campaign is to provide a center for monkeys while _ (educate) the public. He jumped with joy on _(听到这个消息).,The moment I arrived home,immediately,when,arriving,arrival/ arriving,educaing,hearing the news,4,7. the first time/ for the first time (1) I thought him honest _(我第一次见到他). (2) I visited your hometown _ (第一次) last year. 8. by the time By the time I got home, I _ (forget) all about it. By the time I get home, I _ (forget) all about it. 9. not until I didnt know it _(直到你告诉我). It was _ (直到你告诉我)that I knew it. _(直到你告诉我) did I know it.,the first time I met him,for the first time,had forgotten,will have forgotten,until you told me,not until you told me,Not until you told me,5,
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