...设,意思是“若不是”“要不是”,但所指时间不同:if it weren’t (wasn’t) for…(用于现在情况)if it hadn’t been for… (用于过去情况)例如:If it weren’t for water, no plant could grow. 要是没有水植物就无法生长。(指现在情况,故...
老师好,there be A and B就近原则,只考虑A的单复数,例如:There is a knife and fork on the desk.There are a light bulb and a screwdriver on the desk.这两句都是在书上找的,请老师讲下为什么第二个不用is呢?盼复!
We need to have actual knowledge on which to base our thinking.第一个句子为什么定语从句只有不定式没有谓语动词?we need to have actual knowledge which to base on our thinking.第二个句子也是,为什么都是to开头的?
I had remarked onone side of the road, at intervals of six or seven yards, a line of upright stones, continued through the whole length of the barren.onone side of the road, at intervals of six or seven yards这两个介词短语是在从句中作什么成分呢?谢谢老师。