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1) since +过去一个时间点 (如具体的年、月、日期、钟点、1980, last month, half past six)。 I have been here since 1989. 2) since +一段时间+ ago I have been here since five months ago. 3) since +从句 Great changes have taken place since you left. Considerable time has elapsed since we have been here. 4) It is +一段时间+ since从句 It is two years since I became a postgraduate student. 被动语态的几种类型 1)主语句中有一个宾语的被动语态，如: He saw her in the shop yesterday. She was seen in the shop yesterday. 2) 主语有两个宾语的被动语态 Li Lei gave me a chemistry book. I was given a chemistry book by Li Lei. A chemistry book was given to me by Li Lei. 3)主动句中含宾语补足语的句子的被动语态 若宾语补足语是不带to 的不定式，变为被动语态时，该不定式前要加"to"。此类动词为 感官动词:feel, hear, help, listen to, look at, make, observe, see, notice, watch The teacher made me go out of the classroom. --> I was made to go out of the classroom (by the teacher). We saw him play football on the playground. --> He was seen to play football on the playground. 若宾语补足语是带to的不定式，那么被动语态仍保留to: Mother told me not to be late I was told not to be late by mother. 5)情态动词+ be +过去分词，构成被动语态。 Coal can be used to produce electricity for agriculture and industry. 6)表示"据说"或"相信" 的词组 believe, consider, declare, expect, feel , report, say, see, suppose, think, understand It is said that… 据说 It is reported that… 据报道 It is believed that… 大家相信 It is hoped that… 大家希望 It is well known that… 众所周知 It is thought that… 大家认为 It is suggested that… 据建议 It is taken granted that… 被视为当然 It has been decided that… 大家决定 It must be remember that…务必记住的是 It is said that she will leave for Wuhan on Tuesday. |
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沙发#
发布于：2018-10-07 15:46
发的不好请不要介意
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