用定从合并成一句话The foreign friend is from Canada.Our headmaster is shaking hands with him now
问题描述：
用定从合并成一句话The foreign friend is from Canada.Our headmaster is shaking hands with him now
答
The foreign friend whom our headteacher is shaking hands with is from Canada.
这个强调的是外国朋友来自加拿大，楼上回答强调的是 校长和外国朋友握手
答
Our headmaster is shaking hands with the foreign friend from Canada.
答
Our headmaster is shaking hands with the foreign friend who is from Canada now.
改成定语从句,用 friend 做先行词,who 做关系代词
答
Our headmaster is shaking hands with the foreign friend who is from Canada now.