enjoy doing sth be busy doing sth It`s+adj +to do sth . try doing ask to do forget doing forget to do remember to do remember doing let do make do like doing sth start to do sth start doing sth finish doing sth (一般现在时态)be doing would like to do spend......(in) doing sth look forward to doing sth want to do sth decide to do sth It takes sb sometime to do sth It......to do sth be going to do sth/will do(一般将来时态) Thank doing sth