如果词汇量不够，语法不扎实，阅读时生词就多，障碍越多。这不但影响阅读的速度，也影响理解的程度，因而难以顺利通过AEIS考试。

　　系动词除了接adj.n.prep.短语,还可接以下几种表语形式：

　　（1）能接as if/as though表语从句的系动词有：look(看起来)，smell(闻起来)，sound(听起来)，feel(觉得);appear(显得)，seem(似乎)。例如：

　　It looks as if we are going to have snow.看样子天要下雪了。

　　He looked as if he had just stepped out of my book of fairy tales.他看来好像刚从我的童话故事中走出来似的。

　　She seemed as if (though) she couldn’t understand why Laura was there.看来她好像不能理解为什么劳拉呆在那儿。

　　It sounds to me as though there’s a tap running somewhere.我好像听到某处水龙头流水的声音。

　　She felt as if her head were splitting.她仿佛觉得她的头要裂开了。

　　The river appeared as if enveloped in smog.那条河好像笼罩在烟雾之中。

　　It seems as if it were spring already.好像已是春天了。

　　（2）可用于“It+系动词+that从句”结构的有：seem, appear如：

　　It seemed that he had made some serious mistakes in his work.好像他在工作中犯了严重错误。

　　It appeared that he was talking to himself.好像他在自言自语。

　　（3）能用不定式作表语的系动词有：be, seem, , look, appear, prove, grow.

　　Her job is to look after the children.她的工作是照料孩子们。

　　He seems not to look after the children.他好像不是她的父亲。

　　He looks to be a young girl of twenty.他看起来像是一个20岁的年轻姑娘。

　　He didn’t appear to dislike it.看不出他憎恨此事。

　　My advice proved to be wrong.我的建议证明是错误的。

　　（4）能与there连用的系动词有：be, appear, seem.

　　There appeared to be only one room.那儿好像只有一个房间。

　　There seems(to be)no need to go.似乎没有必要走

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