请问大家这句话的语法错误在哪里?

题目

请问大家这句话的语法错误在哪里?
With such perfect basic facilities,teachers can present knowledge to their students more potently and comprehensively and the students would accept such knowledge with great pleasure.Just imagine this,if you stay in a bright and clear classroom,watching the computer's screen to see what your teacher is talking about.Wouldn't that be interesting?

答案

错误在Just imagine this,if you stay in a bright and clear classroom,watching the computer's screen to see what your teacher is talking about.这一句中.该句为条件状语从句,但只有条件从句,没有了主句,watch...