perform前后缀

perform的前缀为pre，后缀为form

例句

1、

The tasks had to be performed in a particular sequence.

这些任务必须按一定次序去执行。

2、

The manager decided to choose a responsible person to perform the task.

经理决定挑选一名有责任心的人来执行这项任务。

3、

This operation has never been performed in this country.

这个国家从未做过这种手术。