关于完成时改过去时Hasn't your friend arrived yet?现在完成时可不可以改成一般过去时Does

关于完成时改过去时Hasn't your friend arrived yet?现在完成时可不可以改成一般过去时Does hasn't your friend arrived yet? The train hasn't arrived yet 关于现在完成时否定式she hasn't forgoten the correct answer yet 为什么这里是用 How come Susan hasn't arrived here yet? hasn't arrived yet 这句的语法讲解 The plane hasn't arrived yet.Could you tell me________? The plane hasn’t arrived yet.Could you tell me____? hasn't anyone repaired this car yet?改成被动 现在完成时,现在完成进行时,过去完成时,一般过去时,的区别 一般过去时、现在完成时与完成进行时的区别 she hasn't taken her medicine yet?改为肯定句时,yet去掉吗?