Question

Tell him ＿＿＿＿＿＿＿ his bike when he leaves．

A．not to forget locking B．don’t forget locking C．not to forget to lock D．don’t forget to lock

Answer 1

选c,不定式短语not to forget .to lock （his bike）在这里充当宾语him的补足语,意思是：告诉他离开的时候不要忘记锁他的自行车

Answer 2

tell sb not to do sth 这样排除BD forget to do是忘记去做某事 forget doing是忘记做过某事 排除A 所以选C

Answer 3

选b tell 所以用don‘t