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, 不可用be, look。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, get, 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。
She looks to be a young girl of twenty year-old.
她看起来像是一个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。
He will grow to like this work gradually.
他会逐渐喜欢这个工作的。
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。

6．能用两种否定形式的系动词有两个：seem, appear.
举例说明：
It doesn’t seem that we can get our money back.= It seems that we can’t get our money back.
He seems not to be her father.= He doesn’t seem to be her father.
The baby doesn’t appear to be awake.= The baby appears not to be awake.

7．后接作表语的过去分词可构成系表结构
能构成系表结构的系动词通常有两个：第一个是常见的be(is, am, was等)；第二个是get，口语中常用。
当二者作系动词用时，它们均表示一种存在状态，而不表示被动动作；当二者作助动词用时，后接作谓语的过去分词构成被动语态。
Be + P.P常可以用get + P.P.来代替，但是并不是be系动词总是可以用get来代替。Get + P.P.系表结构常用于以下两种情况：
1）表示偶然的、突发性的、意想不到的被动动作的结果或状态。
Last night I got caught in the downpour.昨夜我被雨淋了（表示意想不到）
The new car got scratched.新车给刮坏了。（表突发性）
2）表示对自身所作的事。如get dressed, get lost等。
John got injured while playing football last Saturday.约翰上周星期六踢足球时受了伤。
They got married last month.他们上个月结婚了。
另外，要注意区分系表结构与被动语态结构的用法。

考点名称：固定搭配

• 固定搭配：
  英语中的固定搭配主要是指英语中的习惯用法，如有固定用法的一些动词短语、介词短语、名词词组及形容词词组。
  例如：
  take part in (参加) 
  by accident (偶然地) 
  lucky dog (幸运儿)
  be interested in (对…感兴趣)

• 初中英语常见固定搭配：
  (一)加-ing
  enjoy / like doing sth 喜欢做----    
  spend....(in) doing sth 在做---花费---  
  try doing 试着做------                
  be busy doing sth 忙于做------
  finish doing sth 完成做----           
  look forward to + doing sth 期待做----(现在进行时)
  be doing 正在做---     
  Thank you for (doing) sth 为了--感谢你

  （二）加-to
  decide to do sth 决定去做-----             
  ask (sb)to do 要求(某人)去做----      
  It’s+adj +to do sth . 做---(怎么样)        
  would like / want to do 想要做-----    
  It takes sb sometime to do sth在做----花费----
  
  （三）加原形
  let / make sb do sth 让某人做某事   
  be going to / will do sth （一般将来时态）
  
  （四）加-to 或-ing意思不同
  forget doing 忘记做过了-----(已做)    
  forget to do 忘记去做------(还没做)   
  remember doing记得做过了-----(已做)
  remember to do记得去做------(还没做)
  
  （五）加-to 或-ing意思相同
  begin / start to do sth = begin / start doing sth开始做------
  
  （六）
  A）动词+ 介词
  agree with同意....的意见(想法)；符合    
  help ... with ...帮助(某人)做(某事)  listen to听...              
  ..get to到达....       
  fall off (从......)掉下base on以....(为)根据     
  knock at /on敲(门、窗)        
  laugh at嘲笑
  learn.. from 向...学习     
  live on继续存在；靠...生活 
  look after照顾，照看look at看；观看           
  look for寻找             
  look like看起来像
  pay for (sth.)付钱；支付 
  point at指示；指向          
  point to指向....prefer to ...宁愿(选择);更喜欢           
  quarrel with (和某人)吵架
  regard...as ...把....当作....；当作                 
  stop...from阻止.....做.....
  talk about说话；谈话；谈论                        
  talk with与......交谈think about考虑                                  
  think of认为；想起
  B)动词+ 副词                                                     
  ask for请求；询问       
  carry on坚持下去；继续下去     
  cut down砍倒 
  clean up清除；收拾干净  
  come down下来；落    
  come along来；随同
  come in进来            
  come on来吧；跟着来；赶快 
  come over过来；顺便来访           
  come out出来；出现；(花)开；发(芽)      
  drop off放下(某物)；下车                              
  eat up吃光；吃完
  fall behind落在......后面；输给别人            
  fall down跌倒；从......落下
  find out查出(真相)                                
  get back回来；取回
  get down下来；落下；把......取下来             
  get off下来；从......下来get on上(车)               
  get up起床