I gave Jim a book yesterday. （變為被動語態）

A book was given to Jim by me yesterday.

Jim was given a book by me yesterday.

變被動時什么時間+to什么時間不加呢？


請英語語法網參考：

http://www.yygrammar.com/Article/201501/3788.html

http://www.yygrammar.com/Article/200909/1355.html