as if 从句用陈述语气的情况。当说话者认为句子所述的是真实的或极有可能发生或存在的事实时。如：It sounds as if it is raining．听起来像是在下雨。He talks as if he is drunk．从他谈话的样子来看他是醉了。2．as if 从句用虚拟语气的情况。当说话人认为句子所述的是不真实的或极少有可...
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...
Thisiswhereourproblemlies.这就是我们的问题所在。Thatiswhyhedidn’tcometothemeeting.那就是他为什么不到会的原因。Itlooksasifitisgoingtorain.看上去天要下雨了。需要注意的,当主语是reason时,表语从句要用that引导而不是because。例如:Thereasonwhyhewaslatewasthathemissedthetrainbyoneminutethismorning.【注意...
3.当从句放在系动词be，look，remain，seem等后，即构成表语从句。如：thetroubleisthatihavelosthisaddress.麻烦的是我弄丢了他的地址。itseemsthatasifitisgoingtosnow.看起来天要下雪了。4.同位语从句 1)同位语从句是对与之同位的名词中心词作进一步解释。能接同位语从句的常见名词有：idea,fact,news...
honor that she was chosen as the monitor.（主语从句）We heard it that she would get married.（宾语从句）The king’s decision that the prisoner would be set free surprised all the people.（同位语从句）The king’s decision is that the prisoner would be set free.（表语从句）...
is going to snow.这句中as if 引导的是表语从句 原因：as if 只能引导方式状语从句和表语从句这两类，look 为系动词，所以后面跟的从句就是表语从句了。it seems that…中 that 引导的是主语从句 原因：it +不及物动词+that从句（其that引导的从句为主语从句）如：It seems that…似乎…It happ...
一、as if 从句的作用1． 在look, seem 等系动词后引导表语从句。如：She looks as if she were ten years younger．她看起来好像年轻了十岁。It seems as if our team is going to win．看来我们队要胜了。2． 引导方式状语从句。如：She loves the boy as if she were his mother．她爱...
说白了，名词性从句就可以看成一个名词，就是说没了这个从句，句子就缺了一个成分，可能是主语，可能是宾语，总之缺了一部分，句子不完整。比如，what i need is you.如果少了what i need这个句子就缺主语，句子结构就有问题。而定语从句是说，本来句子是完整的，你加上了一部分，或者是补充内容，...
,as,until等 主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中，如果主句的时态是一般将来时，那么从句要用一般现在时。例如：I will tell him about it when he comes.If it is fine tomorrow,we will go outing.如果主句的时态是过去将来时，那么从句要用一般过去时。例如：...
pencil is partly in a glass of water,it looks as if it ___.A.breaks B.has broken C.were broken D.had been broken 选c 选c as if 是看起来，实际未发生，它引导了一个虚拟语气，而因为是一般现在时，现在时的虚拟语气要用were +动词过去分词引导 所以应该选C 我忘了，应该是这样写...
