predicative clause表语从句

Р引导词that? (1)that 在从句中不担任句子成分,无实际意义,不能省略? (2)在表示“建议,劝说,命令”的名词 idea, suggestion, request, proposal 等后面的表语从句中,谓语动词用? should + 动词原形,should可省略РMy opinion is that it’s getting better and better.?The fact was that he didn’t really do it.?My suggestion is that we (should) tell him.?My suggestion is that we (should) start early tomorrow.Рwhether在表语从句中表,但不充当句子的成分。if 引导表语从句.? 1.What the doctor really doubts is whether my mother will recover from the serious disease.? 2. The question is whether it is worth doing.Р“是否”Р不能Р引导词whetherРIt looks as if we’ll be late.  ?Dark clouds are gathering. It looks as if it’s going to rain.Р※如果与事实不符,就用虚拟语气(主句一般现在时从句就用过去式)。Рas if, as though 引导的表语从句Р※在as if, as though 等引导表语从句中,表示与事实相一致时,要用陈述语气。РYou look as if you didn’t care.?She looks as if she were ten years younger.