41. continual, continuous, constant, incessant
这一组形容词都有"不断的，不停的"的意思。
continual a.连续不断的；频繁的。表示时断时续的发生。
That dog's barking is a continual annoyance.那条狗不停地叫，真是烦死人了。
continuous a.不停的，连续不断的，强调中间不停顿。
Our homes and offices need a continuous supply of electricity.我们的家庭以及办公室需要不间断的供电。
constant a.不断的，经常的，强调始终如一地经常出现。
Everything in the universe is in constant motion.宇宙中的万物都在不断地运动。
incessant a.不停的，持续不断的，强调令人厌烦地重复出现，中间有可能有停顿。
Incessant noise makes me appreciate silence.持续不断的噪声骚扰使我喜欢安静的环境。
42. convert, invert, revert, transform
这一组动词都有"转变"的意思。
convert v.转变，变换，含有"使某人改变观点"的意思。
He wants to convert to Catholicism.他要皈依天主教。
invert v.使颠倒，使倒转，使反向。常常表示位置、顺序、方向等的颠倒。
The baby inverted the cup and spilled her orange juice.婴儿把杯子打翻，弄洒了里面的橙汁。
revert v.归还，恢复原状。指回到原来的状态或情形。
John gave his brother a house, and when his brother died, ownership reverted back to John.约翰送给他的哥哥一所房子，当他的哥哥去世后，房子的所有权重新归于约翰。
transform v.改变，转变，指形状、颜色、大小、性质等的改变。
A little paint will soon transform the old house.刷一点油漆很快就会使这所旧房子大为改观。
43. credible, credulous, plausible
这一组形容词都有"可信的"意思。
credible a.可信的，可靠的。
That the student told the teacher a credible story that she missed classes because she was sick.那个学生跟老师讲了实情，她没来上课是因为她病了。
credulous a.轻信的，易于相信的。
She was credulous when she listened to the salesman and bought the car for too much money.她很容易轻信别人，竟然听信那个销售员的话以高价买了那辆车。
plausible a.似乎有理的(可信的)。常带有怀疑的意思。
Even though it is a plausible explanation, I am not completely convinced.虽然这个解释合理，但仍不可能使我完全相信。
44. decline, refuse, reject, deny
这组动词都有"拒绝"的意思。
decline v.婉言拒绝，谢绝，相当于refuse politely，主要用于拒绝有关社交活动的邀请或要求帮助的请求，后接名词或动词不定式，主语只能是人。
I invited her to join us, but she declined.我邀请她和我们在一起，可是她婉言谢绝了。
refuse v.是比较普通的用词，表示"拒绝"，含有非常坚决地、不客气地拒绝的意思。
reject v.抛弃，不采纳，主语可以是人或物，后接名词，不能接动词不定式。
He asked her to go to the movies three times, and each time she rejected him.他三次约她去看电影，但每一次都被拒绝。
deny v.否认，否定，其后可接名词，代词或that从句。
The defendant denied the accusations made against him in court.被告在法庭上否认了对他的指控。
45. deduce, induce, reduce
这是一组形近易混词。
deduce v.推断，推理，演绎。
My friend becomes quiet when his girlfriend is angry with 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气的时候就会变得沉默，今天他很沉默，所以我推断她生气了。
induce v.引诱，劝；引起，导致。
We couldn't induce the old lady to travel by air.我们无法劝说那位老太太坐飞机去。
reduce v.减轻，减小；降低。 He reduced his weight by 20 pounds by eating less and exercising.他通过节食和运动，体重减轻了20磅。
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