To do

　　1. be able to do

　　2. seem to do

　　3. tell(ask) sb (not) to do

　　4. try(one’s best) (not) to do

　　5. take care (not) to do

　　6. be supposed to do

　　7. decide( make a decision) to do

　　8. be careful ( not) to do

　　9. encourage sb to do

　　10. allow sb to do

　　11. used to do

　　12. be afraid to do

　　13. it’s our duty to do

　　14. it’s(it)+ adj.+ for sb to do

　　15. too to

　　16. not enough to do

　　17. would like to do

　　18. be surprised to do

　　19. a good place to do

　　20.make it a lot easier to do

　　21.find it hard to do

　　22.the best way to

　　23.what to do

　　24.how to do it

　　Doing

　　1. end up doing

　　2. be interested in(doing)= take an interest in(doing)

　　3. instead of doing

　　4. spend doing

　　5. make a living by doing

　　6. by doing

　　7. be good at doing = do well in doing

　　8. give up doing

　　9. except/ besides doing

　　10. be afraid of doing

　　11. have a hard(difficult) time/ trouble/problems doing

　　12. would you mind ( not) doing

　　13. what about doing

　　14. see sb doing( do)

　　15. think about doing

　　16. feel like doing

　　17. after doing

　　18. without doing

　　19. 动名词作主语

　　原形

　　1. rather than do

　　2. why don’t you do

　　3. why not do

　　4. will(could) you please (not) do？

　　5. make sb do

　　6. had better do