① decide可用作及物动词和不及物动词，意为“决定，下决心”。用作及物动词时，结构为：

• decide to do sth.
• decide when/who/what…+不定式
• decide+that从句或what从句
• be decided+that从句

例如：

• He can decide the matter for you. 他能为你决定此事。
• She decided to move to Nanjing. 她决定迁到南京。
• He decided not to accept the invitation. 他决定不接受邀请。
• I can't decide what to do with it. 我不能决定如何处置它。
• Have you decided whom to invite？你决定了该邀请谁吗？
• Let's first decide where we should go. 让我们先决定去哪里。
• It has been decided that he will teach us English. 已决定由他教我们英语。

【比较】

• She decided buying a dictionary.【误】 （decide后不跟动名词）

正确的表达是：She decided to buy a dictionary. 她决定买一本词典。

• 他们决定我去开会。

错误的表达是：They have decided me to go to the meeting.【误】 （decide后不可跟复合宾语）

正确的表达是：They have decided that I should go to the meeting.【正】

② decide用作不及物动词时，常同副词或介词短语连用。decide on/upon sth. 表示“就某事做出决定”。

例如：

• You should decide for yourself. 你应该自己做出决定。
• You must decide two days ahead. 你必须提前两天做出决定。
• He hasn't decided on the matter yet. 他还没有就那件事做出决定。

③ decision是decide的名词形式，表示“决定，果断，决议”，为可数名词，常用于下列搭配中：

• come to a decision决定
• make a decision做出决定
• arrive at a decision 决定
• a man of decision果断的人

例如：

• They made a decision at the meeting. 他们在会上做出了决定。
• He hasn't arrived at a decision yet. 他还没有做出决定。