what與that引導(dǎo)名詞性從句時(shí)有何區(qū)別？ 請(qǐng)看題：
?I think __________ he needs is more practice.
?Yes. __________ he needs more practice is clear.
A. what， What B. that， That C. what， That D. that， What
此題應(yīng)選 C。其余三項(xiàng)均可能被誤選。what 和 that 都可以引導(dǎo)名詞性從句，但有區(qū)別。如：
1. what 引導(dǎo)名詞從句時(shí)，它在從句中要充當(dāng)句子成分(主語、賓語等)，而 that 引導(dǎo)名詞從句時(shí)，它在從句中不能充當(dāng)句子成分。
2. what 引導(dǎo)名詞從句時(shí)，它有詞義(表示：什么；所……的[東西])；而 that 引導(dǎo)名詞從句時(shí)，它沒有詞義。
請(qǐng)做以下試題，注意區(qū)別 what 和 that。如：
1. ________ you said is different from the thing ________he told us.
A. What， what B. That， that
C. What， that D. That， what
2. ?I think ________ he said is true.(www.yygrammar.com)
?But don’t forget the fact ________he is a cheat.
A. what， what B. that， that
C. what， that D. that， what
3. ________ surprised us most is ________he spoke English so well.
A. What， what B. That， that
C. What， that D. That， what
答案：1. C 2. C 3. C
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