he asked us to join them改为否定he asked us

网友回答

not to======以下答案可供参考======
供参考答案1:
he asked us _not____ __to___join them
所用词组：ask sb to do sth
ask sb not to do sth
供参考答案2:
不定式的否定应该为 not to do
所以he asked us to join them应改为否定he asked us not to join them