来自黎文彪的问题
heisagoodteacherwhichoftenhelpshisstudent改错
heisagoodteacherwhichoftenhelpshisstudent改错


heisagoodteacherwhichoftenhelpshisstudent改错
heisagoodteacherwhichoftenhelpshisstudent改错
Heisagoodteacherwhich(改为who)oftenhelpshisstudent.
他是位经常帮助学生的好老师.
先行词teacher是指人,所以定语从句的引导词用who.which是指物的.