动词形态he carried the burden back to the court.其中back为什么不用过去式?是

动词形态he carried the burden back to the court.其中back为什么不用过去式?是 the back to back a bag carried on the back 为什么是He says that he will pay back the money to me 而不是return Who's glad to see this guy back on the court?翻译 Date back to the Back to the past 动词填空：She ( ) by the time he got back.(go ) the man whom i saw told me to come back today.为什么用whom.不用who 情态动词：She must have gone back to the vally. the back door burst open 为什么会有两个动词 go back the office跟go back to the office 有什么区别?为什么加to?