(精品)将来时态的被动语态 (2).ppt

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1、Passive voiceallow的用法：1)allow sb.sth.允许某人某事；允许某人某事；2)sb.in(out)允许进入（出去）允许进入（出去）;3)allow sb.to do sth.允许某人做某事允许某人做某事4)doing sth.允许干某事。允许干某事。注：不说注：不说allow to do 类似的动词短语还有：类似的动词短语还有：advise sb.to do /advise doing sth.permit sb.to do/permit doing sth.encourage鼓励鼓励/forbid 禁止禁止不许在候车室吸烟。不许在候车室吸烟。We dont all

2、ow smoking in the waiting room.Smoking is not allowed in the waiting room.We do not allow passengers to smoke in the waiting room.Passengers are not allowed to smoke in the waiting room.Smoking is not allowed in non-smoking areas.Smoking is not allowed in hospitals and schools.Smoking will not be al

3、lowed in any public places.Smoking will be allowed only in smoking areas.dirty water Dirty water will not be allowed to go into rivers before it is made clean.Dirty water must be made clean before it goes into rivers.pollute air Air is being polluted.Air will be polluted.Polluted air cant go into th

4、e air before it is made clean.trees cut downMore trees will be cut down.Few trees will be left.Forests will be disappearing.classroom crowd Our classroom will be more crowded.Our classroom will be less crowded.Population will keep increasing and classrooms and hospitals will be crowded.too many cars

5、There will be too many cars in the streets.The streets More harmful gases AirWhen fossil fuels are burnt,carbon dioxide will into the air,which will bring about a lot of environmental problems.So,carbon emission will be sent into the air.will be polluted more seriously.will be too crowded.be sentmus

6、t be cut.What will be done to make the city more beautiful and attractive?will(not)be donepollution;control/stopPollutions must be controlled.Pollution cannot be controlled unless every one of us makes efforts to do something.unless everyone realizes how serious the problem is,and does something to

7、stop it.streets,widenmore trees;plantbuildset upincrease/developdecrease/reduceWe will make efforts to make our city more beautiful and attractive.Pollution Waste water and waste gasesMore trees More schools and hospitalsPublic transport Our city will look more beautiful and better to live in.must be controlled.must be made clean before they are sent out.will be planted to make the city a green city.will be set up.will be developed.