回答如下:
这两种形式都对。例如:
This is the man who / whom you want to go with.
= This is the man with whom you want to go.
但是,在使用"介词 +
关系代词"引导
定语从句时,不能使用关系代词that 和who。例如:
1. (误) This is the house in that Lu Xun once lived.
(正)This is the house (which / that ) Lu Xun once lived in.
( 正) This is the house in which Lun Xun once lived.
2. (误) I know the man to who you talked just now.
(正) I know the man who / whom you talked to just now.
(正) I know the man to whom you talked just now.