train的ing形式是什么

train的ing形式是training

例句

1、

You can't do much in the art line without training.

没经过训练，你在艺术行业是不会有多大作为的。

2、

To make the training realistic the simulation operates in real time.

为使训练真实，模拟是实时运行的。

3、

They're in training for the big game.

他们正在为大赛进行训练。