When I lived there, I used to go to the seashore on Sundays.我住在那里时,星期天常到海滨去。
(2)while从句的动作与主句的动作同时发生,从句的谓语动词为延续性动词。
Please don't talk so loud while others are working.别人工作时,请别高声谈话。
(3)as从句的动作与主句动作交替进行或同时发生,可翻译为“随着;一边……一边……”。
He hurried home, looking behind as he went.
他匆忙回家去,一边走一边回头望。
As time went on, it's getting warmer and warmer.
随着时间的推移,天越来越暖和了。
2.till和until
在肯定句中主句谓语动词应是延续性的,而在否定句中主句谓语动词应是非延续性的;till不可位于句首,而until则可以。
You may stay here till/until the rain stops.
你可以待在这里直到雨停。
I won't see him till/until his anger has cooled down. 等他怒气消了,我再去看他。
Until you told me, I had no idea of it.
直到你告诉我,我才知道这件事。
3.before和since
(1)before本意为“在……之前”,还可引申为“还未……就……,不到……就……;趁……;还没来得及……就……”。常用句型It will be+一段时间+before从句,意为“还要多久才……”。
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