2012大学英语四级语法：不定式（三）

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带逻辑主语的不定式短语  
　　不定式可以有逻辑主语，其构成形式为“for +代词的宾格(或名词) +不定式”。 带逻辑主语的不定式短语可在句子中作主语、宾语、表语或状语等。
2 A2 u8 z1 {2 q- T1 p% L　　It is not easy for you to catch up with them in a short time.
' k5 y4 n; i; x. k　　I think it better for you to see the doctor.
) h- p: G; D7 f& r- ^　　What we want is for you to understand the matter clearly. 考试用书
& `/ [" K% W& E0 q! F8 a% X: \　　I sent him some pictures for him to see what Paris is like.
7 I( Y6 b4 U( w" |, W& w% V/ D: Y带疑问词的不定式短语
　　不定式前可以加某些疑问代词，如who、what、which,或疑问副词，如when、where、how、why等，构成一种特殊的不定式短语，可在句子中作主语、宾语、表语或状语等。
　　How to improve English is often discussed among the students.
6 M! H) H/ F; w2 D$ D$ i$ \, e　　We haven’t decided when to visit the place.
　　The most difficult thing in learning English is how to speak the language well.
　　You haven’t answered my question where to get these books.
! W. y( F' |1 L7 ?" Q/ _某些动词后的不定式作宾语补足语时，不定式不带to，这些动词是feel, have, hear, let, make, notice, see, watch等。
/ Y0 ^/ k& U; a6 O& t  P% ?& A; a　　Suddenly I felt the atmosphere in the room become tense.
) j' |' n4 T% U　　I often hear them sing this song.