practiced怎么用todo》还是doing?

practiced怎么用todo》还是doing? 用DO ,TODO,doing造句 because stop 是doing 还是todo think of 后面加todo 还是doing have no +名词+doing还是todo eachof后是+ todo还是doing? 用forget todo和forget doing 造句 enjoy后加doing还是todo还是都可以 have a difficult time 后面跟todo还是doing try todo/ doing stick to doing,todo? There is nothing 后跟todo还是doing?还是分情况?请详解,