suppose 普通用詞，指對事物進行假設、設想，所假設的事可能是真實的，也可能是虛
構的（從句需用虛擬語氣）。
1）Supposehe is absent, what shall we do?
假設缺席了，我們該怎麼辦？
2）Let’s supposethat they had not helped us.What would have happened?
假定他們不曾幫助我們，會發生什麼情況呢?
3）Sopposethat one day scientists pick up a transmission which they thinkis
generated by aliens.
假設有一天科學家收到了他們認為是外星人發射的信號。
4）Myths are accounts of important events that aresupposed to have occurred
some time during a culture’sformative years.
神話是描述那些據說是發生的時間在某一個文化的形成年的代重要事件。
assume指主觀上毫無根據的武斷推測或不合邏輯的推理。
1）It is entirelywrong to assume that your wealth entitles you tospecial
respect.
你認為財富能使你享特特殊禮遇，那就大錯特錯了。
2）I assumed that he wouldnot come to attend the funeral.
我猜想他不會來參加葬禮。
3）Some people assume that thereis life on the other planets when they see
UFOs.
有些人看到了不明飛行物就想當然地推測其他的行星上有生命。
presume 與assume一樣，指對事物進行推測，不同的是側重指以過去的經驗或
根據現實的情況作出合乎邏揖的推測和設想。
1）We cannot presume theexistence of life on other planets.
我們不能推定其他行星上沒有生物。
2）John didn’t say whenhe would return, but I presume that he』ll be backfor
dinner.
約翰沒有說他什麼時候回來,但我推測他將回來吃晚飯的。
3）One is presumed to beinnocent before the judge makes the final decision
that he isguilty ofthe crime.
在法官作出最終的判決一個人有罪之前，他是被假定無罪的。
postulate 多用於指證實某一說法或理論而進行的假設。
1）Scientists don't know why dinosaurs wereextinct, but sometheroies
postulate that changes in geography,climate, and sea levels were
responsible.
科學家不知道恐龍為何絕種,有些理論推測是地理變化、氣候和海平面的變化造成的。
2）Evenif we postulate that he had a motive for themurder, that still
doesn’tmean he did it.
即使我們假設他有謀殺的動機，那也並不意味著是他幹的。
3）Freud postulated that weall have a death instinct as well as a life
instinct.
弗洛伊德曾假定我們所有人都有生存本能和死亡本能。
原文內容來自：http://www.enfamily.cn/thread-795582-1-38.html
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