He is a friend.I can depend on him.(用whom连成含定语从句的复合句）?为什么?

He is a friend.I can depend on him.(用whom连成含定语从句的复合句）?为什么? He has a friend. His father is a doctor.合并成含定语从句的复合句 合并成含定语从句的复合句this is a photograph of my friends.i went on hol 把下列句子合并为含有定语从句的主从复合句.1.I have a friend.He likes listening to 将下列句子改为含定语从句的复合句 The boy is good at drawing. He i 将下面几句简单句合并成定语从句：He is the man and I think you can depend on this is a clock .it can tell us time（改为含有定语从句的复合句） I have a good friend the name of whom is Sally.这个是定语从句吗? 定语从句专项练习题改为含定语从句的复合句yesterday i bought a wooden house for my i like the dancer.She dances in a special way.(变为含定语从句的复合句） You can visit a dentist,he will check your teech带定语从句的复合句 You can visit a dentis,he will check your teeth.改成带定语从句的复合句