494　try to do sth., try doing sth., try out和try on

1　try to do sth. 表示“尽力做某事”，相当于try one's best to do sth.。

I shall try to answer all these questions. 我将尽力回答所有这些问题。

They tried to build the bridge in three months. 他们尽全力在3个月内建成那座桥。

2　try doing sth. 表示“试着，尝试”做某事。

They tried making a model plane. 他们试着做一个模型飞机。

He tried swimming across the river. 他试着游过河去。

3　try out 表示“试用”。

They have tried out the new medicine. 他们已试用过这种新药。

Please try it out . 请把它试用一下。

4　try on 表示“试穿”衣服、鞋子等。

She is trying on a new dress. 她在试穿一件新衣服。

Try it on , please. 请试穿一下。