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
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
问英国人
与现在事实相反 从句用一般过去时(be用were)主句用would/should/might/could+动词原形
将来事实相反 从句用 一般过去时或were to do或should do 主句用would/should/might/could+动词原形
过去事实相反 从句用过去完成时 主句用would/should/might/could+have done
When a pencil is partly in a glass of water, it looks as if it were broken.
与现在事实相反,所以从句用过去时,be动词的虚拟用were
The two strangers talked as if they had been friends for years.
从主句talked表示与过去相反,所以从句用过去完成时had been
1. as if可以引导两者从句,一是方式状语从句,二就是表语从句了.
如:It seems as if it is going to rain.
seem是系动词,后面的as if it is going to rain当然就是表语从句.
2. as if引导的从句,其有可能使用陈述语气,也有可能使用虚拟语气.
关键是看其从句所表达的动作是否是真实的.如果明显不符合实际情况,才会用虚拟语气.如果是真实情况,则不必使用虚拟语气,用陈述语气即可.
再如:It seems as if it is going to rain.
此题中的as if从句可以不必使用虚拟语气,因为当时天气情况看起来的确有可能会下雨.
如:You speak as if you were God.
此处的as if的从句就必须使用虚拟语气,因为人不可能是上帝.
3. as if引导从句使用陈述语气时,其时态只需要和主句动作相对应即可,此处不予解释,见谅.
4. 楼主问的应该是as if从句使用虚拟语气时候的谓语动词的构成,现简述如下:
首先必须把as if从句的谓语动词所表示的动作和主句的谓语动词所表示的动作对比,如果:
1)从句动作发生在主句动作之前,则从句使用过去完成时.
如:The two strangers talked as if they had been friends for years.
首先,句意表明的是他们并不真的是多年的朋友,所以as if从句必须使用虚拟语气;
其次,把talked和be friends对比,明显句意是指“在他们谈话之前,他们就是多年的好友”,即从句动作发生在主句动作之前,所以从句使用过去完成时.
2)从句动作和主句动作同时进行,则从句使用一般过去时或过去进行时.
如:When a pencil is partly in a glass of water, it looks as if it were broken.
首先,筷子在水中并没有真正断掉,所以as if从句必须使用虚拟语气;
其次,把look和be broken对比,两个动作明显是同时进行的,所以从句只需要用一般过去时(be动词在虚拟语气时,一般改写成were).
3)从句动作发生在主句动作之后,则从句使用过去将来时.
这一点楼主搞错了,你只是没有见过类似的句子而已,其实as if从句是可以用would do sth的.
如:It seemed as if the night would never end. 夜似乎没有尽头.
首先,夜当然会有尽头,所以as if从句必须使用虚拟语气;
其次,seem和never end对比,明显从句动作在seem之后,所以用过去将来时即would do sth.
5. 写了这么多,只是希望楼主能对此有更深更准确的理解.
呵呵,如果能有点悬赏分就更好了.