动词suppose意思是“假定，认为，想象，需要……条件”suppose后直接跟宾语。比如: An invention supposes an inventor.要有发明，必须先有发明者。再比如：Let us suppose another war.让我们假定再来一场战争吧。

suppose可以跟that引导的从句，表示“认为，猜想”，从句用将来时或一般现在时（表示将来要发生的动作）。比如：I suppose that you will be there.我猜想你会到那里去的。再比如：I suppose it rains tomorrow.我猜想明天会下雨。

suppose也可以用在祈使句中。比如：Suppose your mother saw you now.假如现在*妈看见你呢。

suppose的另外一种用法是suppose后面跟that引导的从句，从句中要用将来时态，表示“想，认为”。比如：I suppose that he will be here at nine.我想他9:00会来。

suppose that 真实条件句，表示“假如，如果”，suppose是从属连词，不是动词。可表示提出建议或请求，也可表示某种“假定”。比如：Suppose I were dismissed, what should I do？假如我被解雇了，该怎么办呢？Suppose it rains, what shall we do?假如下雨，我们怎么办？

另外一个需要掌握的句型是suppose sb or sth 动词不定式。比如：I suppose him to be about fifty.我猜想他50岁左右。再比如：They supposed the box to contain gold.他们猜想那个匣子装着金子。

另外一个常考为结构为：be supposed to do sth.这个结构是个被动形式，其中的to是动词不定式符号，后面要跟动词原形。句子的主语可以是人，也可以是物。当人做主语时，它的意思是“应该；被期望；有义务做”表示劝告、建议、义务、责任等。当物做主语时，表示“本应；本该”，多指某事本应该发生而没有发生。比如：

We are supposed to start work tomorrow every morning.我们理应明早开始工作。The plane was supposed to take off twenty minutes ago.飞机应该在二十分钟之前起飞。Everyone is supposed to bring a bottle to the party.每个人都应该带一瓶酒参加宴会。请看一个考题：

They_____to meet at the school gate at six o'clock in the morning.
A. will suppose B. are supposed C. supposed D. should be supposed
题句的意思是:他们要在早晨六点钟在校门口集合。这里选B，用be supposed to结构，后面跟原形动词meet。

另外suppose延伸出来的supposing这个词，是从属连词，意思是“倘若，假使”，后面可以跟句子。比如：Supposing (that) you are wrong, what will you do then?假设你错了，那你会怎么办？

Objections to this plan -- supposing there should be any-- must be made directly.对这个计划的反对意见——假使有的话——，请马上提出。原句将supposing there should be any插在句子中间了。