Question

I don't think your friend________worry about your son．I think he will be all right soon．

1. A.
   need
2. B.
   needs
3. C.
   need to
4. D.
   not need to

Answer 1

A
分析：要注意I don't think跟賓語從句時有否定轉(zhuǎn)移的概念，所以要把四個選項看成否定形式，并且跟上后面的動詞，A項是needn't worry about，是正確結(jié)構(gòu)，B項是doesn't need worry about，是錯誤結(jié)構(gòu)，C項don't need to worry about，本身是正確結(jié)構(gòu)，但和主語your friend結(jié)合在一起，屬于主謂不一致的錯誤，D項本身是否定，再否定就變成肯定了，而且這種否定的形式是錯誤的。所以應(yīng)該選A項。(延伸)I don't think your friend need worry about yourson．中的need是情態(tài)動詞，按理說不可以用在肯定句里，但由于這里有否定轉(zhuǎn)移的概念，所以又成為正確的結(jié)構(gòu)，是應(yīng)該注意的問題。(題型變化)本句＝I don't think your friend needs to worry about your son．