She opined that it would snow tomorrow.

她认为明可能要下雪。

We have had incessant snowfall since yesterday afternoon.

下午开始就持续不断地下雪。

It seems to me that it will snow.

我看要下雪。

Snow is absent in some countries.

有些国家不下雪。

There is every appearance of snow.

看是一定要下雪了。

It snowed at intervals this week.

这星期不时下雪。