decide：[di'said] vt.＆vi.决定，决心；名词形式为decision。其基本用法如下：
1)跟名词或代词：
①It is the people who decide the fate of mankind.
决定人类命运的是人民。
②The question will be decided by themselves.
问题将由他们自己决定。
2)跟不定式：
①He decided to give a one-man show.他决定唱一段独角戏。
②We haven't decided when to start.我们还没决定何时动身。
3)跟从句：
①Let's first decide where we should go.
(=Let's first decide where to go.)
我们先决定一下到什么地方去。
②It is not decided whether we will go there.
还没有决定我们是不是去那儿。
4)跟介词短语(跟on或upon，表示“就某事做出决定”)：
①Don't decide on important matters too quickly.
重要的事情不要匆忙做出决定。