最近她看了一些有关历史的书。4.Whenitrains,thesoilwillbewashedaway.下雨时,土壤就会被冲走。willbe+过去分词为一般将来时的被动语形式。如:Theearthwillbeblownawaybythewind.泥土将会被风刮走。(被动语态)=Thewindwillblowawaytheearth.风将会把泥土刮走。(主动语态)5.Alotofrichlandhaschangedintodesert,leavingonlysand.许多肥沃的土地已经变成了沙漠,留下的是遍地黄沙。a)change…into…=turn…into…把…..(转)变成…..如:Pleasechange/turnEnglishintoChinese.请把英语变成汉语。Whenthetrafficlightschange/turnintogreen,wecango.当交通灯变成绿色时,我们就可以通行。b)leavingonlystand现在分词短语作状语,表伴随。如:Thechildrenwentaway,talkingandlaughing.孩子们说着、笑着离开了。Thegirlislookingforhermother,cryingloudly.这个女孩大声地哭着在寻找她的母亲。6.Treescanstopthewindfromblowingtheearthaway.Theycanalsopreventthesandfrommovingtowardtherichland.树可以防风固土,也可阻止风沙吹进良田。Treescankeepwaterfromrunningaway.树可以防止水土流失。stop/preventsb./sth.(from)doingsth.阻止/防止某人或某物做某事keepsb./sth.fromdoingsth.阻止/防止某人或某物做某事
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