當to作為動詞不定式的標志時,后面加動詞原形,作為介詞的詞性時,用v-ing的形式.
這些動詞后面接的to用動詞原形：
want, wish, hope, manage, pretend, decide, learn, agree, expect, demand, long, ask, care, choose, dare, fail, offer, plan, prepare, promise, refuse, desire, happen, appear, intend, would like to, be said to
to后用動名詞：
be/get used to doing 養(yǎng)成做……習慣
get down to開始做……;look forward to…盼望……;stick to…堅持做……;lead to…導致……;devote oneself to…獻身于……;to be devoted to …獻身于……;pay attention to …注意……;object to 反對做……