if it ——tomorrow we will have a picnic..A.won't rainB.doesn't rainC.isn't rainingD.n't rain.B和C的区别是什么?what if he ——?A.A.won't comeB.doesn't comeC.isn't comingD.wouldn't come..与上题类似..可我也不明白B和C.

问题描述:

if it ——tomorrow we will have a picnic..
A.won't rain
B.doesn't rain
C.isn't raining
D.n't rain
.B和C的区别是什么?
what if he ——?
A.A.won't come
B.doesn't come
C.isn't coming
D.wouldn't come
..与上题类似..可我也不明白B和C.

B是一般现在时,表示客观陈述,如果明天下雨,就怎么怎么的。C是进行时,只能在当下的确在下雨的时候才能说。
第二题同理

这两道 题的B项是一个道理,都是陈述客观事实的,所以就用一般现 时就可以了,而C项都是现在进行时,只能表示说话时正在进行的动作。

都选B.
在IF条件句中都是用一般现在时表示将来意义.