一、容易混淆的动词：
[考试说明] 了解及物动词和不及物动词用法；掌握动词不定式作宾语、宾语补足语、状语以及疑问词。连用构成不定式短语的基本用法；理解动词不定式作主语和定语的用法；初步掌握延续性动词和瞬间动词在用法上的区别等。
 

1. come & be here
[误] He has come here for three hours. 
[正] He came here three hours ago. 
[正] He has been here for three hours.

come 是瞬间动词，不是延续性动词，在肯定句中不能与表示一段时间的状语连用。而要与表示一段时间的状语连用，就要用延续动词。
 

与此同类的还有 borrow/lend-keep; join-be in/at; die-be dead; buy-have; leave-be away,etc.

2. cost & take & spend & pay
[误] I cost a lot of time to read stories. 
[正] It cost me a lot of time to read stories. 
[正] I spent a lot of time reading stories.

cost 除了钱的花费以外，还能表示时间上的花费，但常用物做主语。spend 句子主语是人，可指花费时间和金钱，但后面的动词要用-ing 形式，后面也可跟名词短语，介词用 on。pay 句子主语是人，常与 for连用，buy 也常与 for 连用，但花费“钱”要放在介词 for 后面，而 pay 则放在介词 for 前面。

3. join & take part in
[误] He joined the League for two years. 
[正] He joined the League two years ago. 
[正] He has been in the League for two years. 
[正] He has been a League member for two years.

join 指“参加”组织，成为一个成员，join sb.意思是“加入某人”，take part in 指参加活动特别是大的运动；如指“参加…多长时间”就要用延续动词 be in 或 be a …member，而不能用 join。