请问?if 引导的宾语从句后的正确时态 谢 急

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• 请问?if 引导的宾语从句后的正确时态 谢 急
• 请对before引导的主从复合句的时态判别?（before在……之前）说明：before引导的主从复合句,若均表示在过去发生的事情,从句一般用一般过去时,而主句可以用一般过去时,也可以用过去完成时.例如：Henry visited New York before he left for washington.He had learned English for 3 years before he came here.请看那下面两句.请问哪个是正确的?还是两个均正确?（主要是主句时态表达的合理或不合理）请说明理由.I got there before I met him.I had gotten there before I met him.
• 请问?the same as中,as引导的到底是比较状语从句?还是定语从句?怎样区别?This is the same pen as i bought yesterday .as后的是什么从句?as做什么成分?So people from the mountains in the southeastern USA speak with almost the same dialect as people in the northwestern USA.在这句中as引导状语还是定语从句?as 在两句中二者都充当什么成分?怎样区别?急 ；急 ；急； 急······
• 请问?if 引导的宾语从句后的正确时态 谢 急
• if 引导的宾语从句的时态She didn't tell me if she _____(度过)this summer vacation here this year.请问这里应该怎么填?我填的是spent但是答案给的是would spent用了过去将来时了?它解释说宾语从句的时态应该与主句的事态保持一致.但是我看if引导的从句用了过去将来时,但是主句用的是过去时,也没用保持一致啊?为什么?
• 虚拟语气as if 引导的从句问题首先问一下as if可以引导表语从句么?请给以个举例,as if 引导的从句,从句谓语动词应该使用什么?是did 还是 had done?既然跟wish后接宾语从句的谓语动词一样,为什么没有would do?原句When a pencil is partly in a glass of water,it looks as if it were broken.请问为什么用were broken?跟时态有关么?原句The two strangers talked as if they had been friends for years.为什么谓语动词是had been?而不是were或者其他的
• IF 引导的宾语从句的时态怎么用那回答怎么说?
• if条件状语从句的时态练习1.If Bruce ________(be) free,Let’s go to the park.2.Tell him the news if you ________ (meet )him tomorrow.3.If he ________(do) well in the exam.His teacher will be pleased with him.4． If Mary ________(leave ) home too long,she ________(miss) her parents.5.Be quick ,and you _________(arrive) in time.6.Hurry up,or you_________(be ) late for school.三． 将下列句子改为含if条件从句的复合句 1.Get enough sleep ,and we won’t feel tired._______________,we won’t fee