1、decide to do sth，意思为决定做某事，例如He decides to go to school bu bus他决定坐公交去上学。2、decide on or upon doing sth，意思是就重大事情作出决定，例如We decide on leaving我们决定离开。3、decide+宾语从句。4、decide+as+形容词，充当补足语的复合宾语。

例句：1、The company has decided it must present a more modern image.

公司已决定，必须展现出更加现代的形象。

2、It was decided the school should purchase new software.

已经决定学校要购买新软件。

3、It was decided to bring the meeting forward two weeks.

已决定把会议提前两周。

4、They decided to sound out her interest in the project.

他们决定试探一下她对那个项目的兴趣。

5、We thought long and hard before deciding to move house.

我们经过长久慎重的考虑之后才决定搬家。