on doing和upon doing是一样的吗?如果不是,
on doing和upon doing是一样的吗?如果不是,
carry carry on 和go on的意思一样吗?是carry on doing 还是carry on to do
upon doing
continue doing和keep doing,go on doing是同义词组吗?
Upon doing 引导的句子
carry with sth和carry on doing sth一样吗?
有decide doing sth.吗?为什么书上写decide on(upon) sth./doing sth.?
continue doing表示的动作是否有间隔?(和go on doing_一样吗?
upon+doing sth有“一.就.”的意思吗?
admit to doing 和admit doing一样吗?
不定式中to的词性是什么?如果是介词,介词后面不是应该加doing吗?
spend in doing 和 spend on doing的区别