什么时候用need do 什么时候用need to do?,比如need buy 与need to buy

什么时候用need do 什么时候用need to do?,比如need buy 与need to buy wat do you need to buy? Who else do you need to buy ( 英语里什么时候用need to do sth什么时候用need doing sth? 九年级英语语法,If与weither的区别,need to do 和need doing分别什么时候用什么时候用过去完成 Do we need to buy any vegetables还是Do we need to buy some veg need后面什么时候用to need sth与need to do sth need to do ,need doing 英语改错 what else things do we need to buy need的用法!全一些,什么时候用to do?什么时候用doing? How do you need to buy a computer what 用中文怎么读 不是翻译