1、credible, credulous, plausible都有"可信的"意思。
crediblea.可信的，可靠的。
That the student told the teacher a credible story thatshe missed classes because she was sick.那個學生跟老師講了實情，她沒來上課是因爲她病了。
credulousa.輕信的，易於相信的。
She was credulous when she listened to the salesmanand bought the car for too much money.她很容易輕信別人，竟然聽信那個銷售員的話以高價買了那輛車。
plausiblea.似乎有理的(可信的)。常帶有懷疑的意思。
Even though it is a plausible explanation, I am notcompletely convinced.雖然這個解釋合理，但仍不可能使我完全相信。
2、decline, refuse, reject, deny都有"拒絕"的意思。
declinev.婉言拒絕，謝絕，相當於refuse politely，主要用於拒絕有關社交活動的邀請或要求幫助的請求，後接名詞或動詞不定式，主語只能是人。
I invited her to join us, but she declined.我邀請她和我們在一起，可是她婉言謝絕了。
refusev.是比較普通的用詞，表示"拒絕"，含有非常堅決地、不客氣地拒絕的意思。
rejectv.拋棄，不採納，主語可以是人或物，後接名詞，不能接動詞不定式。
He asked her to go to the movies three times, andeach time she rejected him.他三次約她去看電影，但每一次都被拒絕。
denyv.否認，否定，其後可接名詞，代詞或that從句。
The defendant denied the accusations made againsthim in court.被告在法庭上否認了對他的指控。
3、deduce, induce, reduce 這是一組形近易混詞。
deducev.推斷，推理，演繹。
My friend becomes quiet when his girlfriend is angrywith him; today he is quiet and so I deduce she is angry.我的朋友在他的女朋友生他的.氣的時候就會變得沉默，今天他很沉默，所以我推斷她生氣了。
inducev.引誘，勸；引起，導致
We couldn't induce the old lady to travel by air.我們無法勸說那位老太太坐飛機去。
reducev.減輕，減小；降低。
He reduced his weight by 20 pounds by eating less andexercising.他通過節食和運動，體重減輕了20磅。
4、delay, postpone 這兩個詞都有"延遲"之意。
delayv.延期，延緩，耽擱，指由於不可避免的障礙等原因而延期。
Her late arrival delayed the start of the meeting.她的遲到使會議延遲開始。
postponev.耽擱，暫緩，常指將某事放置一邊，等到另一事發生或一定時間後再做。
Our meeting for today was postponed until next week.我們今天的會議推遲到下週舉行。
5、demonstrate, illustrate都有"說明"的意思。
demonstratev.多指通過具體動作或物體進行演示、示範、表演、展示等以達到說明或解釋的目的。
This salesman demonstrated how to cook with apressure cooker.這個推銷員當衆演示如何用壓力鍋煮東西。
illustratev.強調通過舉例、列圖表或比較等方式來說明道理。
The teacher illustrated the history lesson by telling astory about George Washington.那個老師通過喬治·華盛頓的故事來講述他的歷史課。
