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̬canܣmayԣmust룩have toòought toӦãdareңused toȥhad betterwould ratherԸڿ϶Ǻ߶Ҫ ԭ .ڷ񶨾Уcanmaymustdare߼nothave toought toֱhaveoughtnotused toķʽused not toҲdidn't use toõý϶ࣻhad betterwould ratherķʽֱhad better notwould rather not.Щ̬ʱijһԡ

϶ͷ񶨾е̬

һ̬ʵʽڿ϶еıȽ

1. canʾġܡݿ͹ijֶġԡ

1 Mild forms of execrise can some of the loss of flexibility that accompanies aging.

A stopB to stopC stoppingD be stoppedʾľ嶯ʱ be able to

He was able to do that without any help.Ҫκΰ

2. mayʾԡ൱be allowed to

2 If there is social or political change in a region A where a standard language B is spoken local varieties C of the language may developing D .

maymightɺas wellãʾ顱ΪǡΪá

You may as well keep a certain distance from that mad man. ǻǷԶΪá

You might as well go home now.㻹ڻؼΪá

3. mustʾ롱Ӧһ

3 The formation of snow must be occurring A slowly B in calm air and at a temperature near C the freezing point D .

4. have to ӶԭΣʾò롱mustǿ͹

Tom had to work into the deep night everyday to earn a living. ķΪÿ춼ùҹ

5. should ʾȰ桱顱ʱӦʾԤ⡱͡ܡ

He should take care of his parents as they are old enough not to live on themselves. ڸĸˣӦչǡ

He should be there now. ܵˡ

should have doneбʾ𱸻ڡ

6. ought ֻһʽoughttoȻӶԭαʾ񡱻򡰱Ҫij£ΪӦӦá

4 The traditional goal of science is to discover how things arenot how they ought .

A toB to beC beD have been

5 You are quite rightI am inferring in my comments A that McGraw had not ought to B have broken C in the room without his permission D .

7. dare ̬ʣtoĶʲʽҪڷ񶨾Уʱ˳ƵβӪsЪINGִʽdaring͹ȥʽEDִʽdared

6 Although Oriental ideas of woman's subordination to man prevailed in those daysshe meet with men on an equal basis.

A did not dared B dared not C dared not to D did dare not to

̬һʱ񶨾е÷

can'tcan not cannot ʾܡ may not ʾԡ mustn'tmust not ʾһҪɡneedn't need not ʾءdare not ԭ ʾҡ

He can't finish his essay by this time. дġ

He may not sleep now. û˯

You mustn't criticize her in that way. 㲻Ӧ

You needn't come tomorrow. ûҪˡ

He dared not meet his fiance. ҼŮѡ

1 ȷΪA.̬canҪԭΣBCԣcanȻбʽϺ﷨ߺ󲿷ֶ޷νӣDҲ

2 DΪdevelop.mayҪԭΣdevelopingڷִʣȻҪӦΪdevelop.

3 A must occur˴˵ǿ͹󣬶ǿڷ£һʱ

4 BΪȷ𰸡

5 BΪought not to.

6 BΪȷ𰸡


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