一、“名詞 + 不定式”中,如果這個名詞與不定式有邏輯關(guān)系——主謂、動賓或動狀——時,不定式就是后置定語.這種情況下,不定式可以用“關(guān)系詞 + 主語 + will/can/be able to + 動詞”改寫為定語從句,如：
1、There are many things to do （things 和 to do 之間是動賓關(guān)系）,可以改寫為——
There are many things that one can do
2、There's no（或者 not any）room to put at this at/in (in the car).（room 和 to put this at/in是動賓關(guān)系）,可以改寫為——
There's no room at/in which we can put this in the car.或 There's no room which we can put this at/in (in the car).
3、I have something to say.（something 和 to say 是動賓關(guān)系）,可改寫為
——I have something which I will say.
4、He is always the first one to come.（the first one 和to come 是主謂關(guān)系）,可改寫為
——He was always the first who could come.
5、That’s the way to do it.（way 和to do it 之間是動詞和方式狀語關(guān)系）,可改寫為
——That’s the way in which one can do it.
6、There's no room to put this in the car.（room 和to put this 是動詞和處所狀語關(guān)系）,可改寫為
——There's no room where we can put this in the car.或者 There's no room at which we can put this in the car.
二、如果這種結(jié)構(gòu)中的名詞和不定式?jīng)]有任何邏輯關(guān)系,不定式可能就是整個句子的目的狀語.這種情況下,不定式可以用 in order to do 或 so as to do 改寫,如：
1、You must come to my office to see me on Sunday.可改寫為
——You must come to my office in order to see me on Sunday 或 You must come to my office so as to see me on Sunday.
2、We harried to the school to be in time for the parents meeting.可改寫為
——We harried to the school in order to be in time for the parents meeting.
三、there 后是否跟 to do 或 doing 取決于be 后的主語是無行為能力的事物還是有行為能力的人.
1、there is something to do 表示“有某事要做”,to do 是由人實(shí)施的,something是行為對象.（例句見上）
2、there is someone doing 表示“有人在做某事”,doing 是由someone 實(shí)施的,如：
There are some students playing football on the playground.
因此 there are many things to do 是正確的,there are many thing doing 是錯誤的.
四、I can't find a quiet place to study 中 place 和to study 是動詞何處所狀語關(guān)系,等于 I can't find a quiet place where I can study,因此應(yīng)該是定語.
英語是英語,漢語是漢語,英語的語法結(jié)構(gòu)不能翻譯為漢語進(jìn)行解釋,事實(shí)上,"我找不到安靜的學(xué)習(xí)場所" 和 "我找不到安靜的場所來學(xué)習(xí).",是漢語中同一個意思的兩種表達(dá)方法,并不能證明后者就是目的狀語,而且用目的狀語解釋也有些牽強(qiáng)附會,“為了學(xué)習(xí)我找不到安靜的地方”該作何解釋呢!倒是可以說“為了學(xué)習(xí)我不找吵鬧的地方”.