1.平时经常见到用to加动词来表达单个动词的意思,如to want,to feel,to know等,为什么前面要加to?
2.在这个句子里What has he got in his bag? ,能否改成What has he in his bag? ? 为什么?
3.a.When we were having lunch,my mother told us a story.
b.As we were watching TV,the postman arrived.
以上两个从句,为什么一个用when作连词,而另外那个用as作连接词?可否互换?
初学英语,请大大们指教,谢谢!