1．I think意为我认为，是对某人或某事的看法或态度的一种句型。其否定式常用I dont think，如：I think hes Mr Zhinag. (L17)I dont think you are right.
2．give sth. to sb./ give sb. sth. 意为把给，动词give之后可接双宾语，可用这两种句型；若指物的宾语是人称代词时，则只能用give it/ them to sb. 如：
His parents give him a nice purse./His parents give a nice purse to him. Give it to Mr Hu.(L57)
3．take sb./ sth. to意为把(送)带到，后常接地点，也可接人。如：
Please take the new books to the classroom.
4．One, the other/One isand one is意为一个是；另一个是，必须是两者中。如：One is red and one is grey.(L50)或 One is red,, the other is grey.
5．Let sb. do sth. 意为让某人做某事，人后应用不带to的动词不定式，其否定式为Dont let sb，do sth.，或Let sb. not do sth. 另外，Lets 与Let us的含义不完全相同， 前者包括听者在内，后者不包括听者在内，如：Lets go for a walk./Let us try once more, please.
6．help sb. (to) do sth./help sb. with sth.意为帮助某人做某事，前者用不定式作宾补，后者用介词短语作宾补，二者可以互换。如：
Let me help you find it.(L42)/Let me help you with it.
7．What about？/How about？意为怎么样？是用来询问或征求对方的观点、意见、看法等。about为介词，其后须接名词、代词或V-ing等形式。如：
What/How playing chess?
8．Its time to do/ Its time for sth. 意为该做的时间了，其中to后须接原形动词，for后可接名词或V-ing形式。如：
Its time to have supper. =Its time for supper.
9．like to do sth./like doing sth.意为喜欢做某事，如：
Li Lei and his friends like to play in the tree house. (L 43)
前一种句型侧重具体的一次性的动作；后一种句型侧重习惯性的动作，试比较：
Tom likes swimming, but doesnt like to swim this afternoon.
10．ask sb.(not) to do sth. 意为让某人(不要)做某事，其中ask sb.后应接动词不定式，如：
Ask your friends to guess what is in it. (L44)
11．show sb. sth. / show sth. to do. 意为把某物给某人看，该句型的用法同前面第2点。如：
Show your friend your family photo.（L36）/Show your family photo to your friend.
12．introduce sb. to sb. 意为把某人介绍给另一人；introduce to sb.则是向某人作介绍。如：
Introduce your family to her. （L37）