1.i feel like going to bed early tonight 这里为什么用going而不用go?为什么?
句型：feel like doing sth.
2.Are you interested in working for us?这里为什么working而不用work?为什么?
句型：be interested in doing sth.
3.I appreciate your telling that 这里为什么不用tell 或者told?为什么?
句型：appreciate doing sth.