原形不定式

使役动词

  （1）使役动词，表示“使/让……”

  have, make, let 做使役动词，构成形式为：

  have/make/let + 宾语 + 动词

  1.He made me laugh.

  2.I let him go.

  3.Please have him come here.

  （2）get和help都做使役动词，get的使役动词为：

  get + 宾语 + to + v

  help的使役动词为：

  help + 宾语 + （to） + v

  1.I can’t get anyone to do the work properly.

  2.I helped him (to) repair the car.

  （3）1，2所有使役动词 + 宾语 + 过去分词，表示：

  让某物/人被别人……

  1.I must get my hair cut.

  2.He couldn’t make himself heard.

  3.Can you get the work finished in time?

练习

  1.He made me (laugh).

  2.I let him (go).

  3.I must get my hair (cut).

感官动词

  （1）感官动词：

  see watch ovserve notice hear smell taste fell + 宾语 + 动词原形/现在分词。

  a.+动词原形，表示动词的真实性；

  b.+现在分词，表示动作的连续性，进行性。

  I saw him work in the garden yesterday.

  I saw him working in the garden yesterday.

  （2）和使役动词类似，感官动词可接过去分词：

  感官动词 + 宾语 + 过去分词。

  John saw the man knocked down by the car.

练习

  1.I watched a dog (running) in the garden yesterday.

  2.I heard Sam (sended) to the hospital.