②across与through的区别:across指从物体的一边到另一边、横过、越过,而through指从物体的中间通过.
He walked across the bridge and then through the valley ;You can fly across the U.S. in about five hours ; We will be across the border by tomorrow 。
③after 与behind 的区别:after 表位置时,一般指次序先后,意为跟在.后面,次于. e.g.
Your name comes after mine on the而behind 指物体静态位置的前后(其反义词为in front of ) 且常指在物体本身之外的后面(若指物体本身后面用in/at the back of, in/at the back of的反义词为in the front of) e.g. Many people are sitting in the back of (in the front of ) the room. There are many trees behind (in front of ) the house; behind 还可指落后,过了时刻,耽误时间. E.g. He fell behind the others; He fell behind theafter也可指时间:after +时间点可用于将来时和过去时,而after +时间段只用于过去时;但in +时间段只用于将来时,e.g. I will be back in two hours(after two o'clock); He returned home after three days(two o'clock).
④besides;except;but;except for;but for的区别:A. besides与except用于肯定句时, (汤母没去)指除...外(不再有) besides指除...外(还有).e.g.We all went to Zigong except Tom(汤母没去);We all went to Zigong besides Tom(汤母也去了) ; B. except 与but后都可接名、代、动名词和不定式及动词原形,且能互换;但except后还可跟副词、副词从句和介词短语等。E.g. He answered all the questions but/except the lastThe window is never opened except in summer;He has always been in high spirits except recently;C. besides;except;but用于否定句时,可以互换: e.g. There aren't any other people to be considered esides/except/but D.but for 指要不是.e.g. But for your help , we couldn't have finished the work so而except for 指从某一细节方面修正前面的概过性说法,其后的宾语一般与句子主语所涉及的东西不属同类.e.g. Your composition is good except for some spelling mistakes.
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