一．后面可跟动词的ing形式的情况
1.动词： finish doing sth.完成做某事；enjoy doing sth. 喜欢做某事；practice doing sth. 练习做某事；imagine doing,想象做某事；avoid doing sth.避免做某事；consider doing sth.考虑做某事；suggest doing sth.建议做某事；mind doing sth.介意做某事； keep doing sth.持续做某事
2.固定短语： feel like doing sth.喜欢做某事；be busy doing sth.忙于做某事；be worth doing 值得做某事；spend time (in) doing sth.花费时间（金钱）做某事； have difficult/trouble in doing sth做某事有困难；have fun doing.做某事高兴
