问
I ____ you of his honesty. A. assure B. insure C. ensure D. sure(大学生英语竞赛题)
答案为 A(assure)。不知能否选 C。
答
应记住,只有 assure 才可以用于 assure sb. of,而 ensure 不能用于此种结构。
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He assured us of his ability to work. (LDCE) 他向我们保证他有工作能力。
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He assured me of his readiness to help. (ALD)
他向我保证他愿意帮忙。
ensure 只能用于 ensure sb. sth., ensure sb. against sth. 和 ensure that 从句结构。
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This medicine will ensure you a good night's sleep. (LDCE) 这种药一定能使你晚上睡好觉。
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Vaccinations ensure one against diseases. (MD)
assure sb. + that
注射疫苗能防止人患病。
- We must ensure that the telegram arrives in time. (Nelson, 500D)
我们必须保证电报能及时送到。
练习
The patient has been ____ of the safety of the operation.