英语四六级考试中，单独考察语法的题型不多，但是语法知识点却是学习英语必不可少的基石，唯有地基牢固才有摩天大楼，以下语法知识考生们赶紧get吧！

　　to do/of doing

　　不同的名词,对这两种后置定语的选择是有区别的,有的只能用to do,有的只可用of doing,有的两种都可以.现分述如下:

　　⑴will, willingness, suggestion, conclusion, decision, permission, agreement, refusal, determination, proposal, resolution等,一般用不定式作后置定语.

　　如:

　　mary has the will to win the first prize.(不用of winning)

　　玛丽有获得一等奖的决心.

　　he has drawn a conclusion to go abroad with his family.(不用of winning)

　　他已作出了携家去国外的决定.

　　⑵hope, risk, possibility, impossibility, probability, intention, prospect, responsiblility, aim等,一般只能用of doing作后置定语.

　　如:

　　in fact,tere is no hope of their winning the game.

　　事实上,他们没有希望赢得这场比赛.(不能说for them to win)

　　he will run the risk of losing his life to save the child.

　　他将冒生命危险去救那个孩子.

　　⑶way, chance, need, necessity, right, freedom, power, opportunity,ability等,既可用不定式短语,又可用of doing短语作后置定语.

　　如:

　　their chance to go(of ging) abroad was lost.

　　他们失去了出国的机会.

　　he has the right to do (of doing) that.

　　他有权那样做.

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