一. 常接to do的搭配
（1）动词+to do：
decide/determine, learn,
want, expect/ hope;
refuse, manage, wish, pretend;
offer, promise, choose, plan;
agree, ask/ beg, help等
记忆口诀：决心学会想希望，拒绝设法愿假装；
主动答应选计划，同意请求帮一帮。
（2）动词+sb./sth. +to do：
如：want, get, wish, expect, ask, tell, order, command, beg, permit, help, advise, persuade, allow, prepare, cause, force, drive, forbid, encourage, call on, wait for, invite, teach, remind, request, prefer, train, warn等
注：特殊动词常跟不带to的不定式作宾补，但变为被动语态后，不定式的to不能省略。这类特殊动词有：
记忆口诀：五看三使役：
see/look/watch/notice/observe, make/let/hav
二听一感半帮助：hear/listen to, feel, (to) help
主动to字要离去，被动to字要回府。
（3）It形式主语
① It + be + 形容词 + for/of ... + to do
It be + difficult/easy/important/impossible/necessary（修饰事情）... for sb. to do sth.
某人做某事是……的
It be + careless/clever/foolish/silly/stupid/kind/brave（修饰人）... of sb. to do sth.
某人做某事是……的
It is important for me to learn a foreign language.
It is kind of you to help me.
② It + be +名词词组 + to do
常用名词词组：a pity, a fact, a pity, a shame, an honour, a question
It’s a pity to leave so early.
③ It + takes (sb.)+ 时间（金钱）+ to do
It will take a whole day to get to the top of the mountain on foot. 步行将花费一整天时间到达山顶。
二. 常接doing的搭配
（1）动词+doing：
consider, suggest/ advise, look forward to, excuse/ pardon;
admit, succeed in, delay/ put off;
avoid, miss, keep/ keep on, practice;
deny, finish, enjoy, appreciate;
forbid, imagine, risk; can’t help, mind, allow/ permit, escape等
记忆口诀：考虑建议盼原谅，承认成功要推迟。避免错过继续练，否认完成就欣赏。
禁止想象才冒险，不禁介意准逃亡。
（2）介词+doing
无论是普通介词还是含介词的动词短语，一般情况下要用doing作宾语。常见短语比如：
be used to (习惯于) + doing be accustomed to (习惯于) + doing
be opposed to (反对) + doing object to (反对) + doing
lead to (导致) + doing be devoted to (献身于) + doing(devote oneself to doing)
stick to (坚持，坚守) + doing get down to (着手) + doing
pay attention to (注意) + doing reduce sb./sth.to (使沦为) + doing
look forward to (期待) + doing resort to(依靠，求助于) + doing
Mr. Smith gave up smoking according to his doctor’s advice.
Jealousy and anger usually lead to doing the wrong thing.
（3）固定短语句型
spend .../have difficulty + (in) doing 花费……/有困难做某事
They spend two hours in doing excise every day.
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