帮我改成疑问句和否定句!拜托啦，有急用。

is it very pleasant?
it isn't very pleasant.
is it often windy in March?
It isn't often windy in March.
does it rain sometimes?
It doesn't rain sometimes.
does the sun shine every day?
The sun doesn't shine every day.
is it often coid?
It isn't often coid.
别忘了大小写
采纳吧~亲~

Is it very pleasant? It's not very pleasant
Is it often windy in March? It's not often windy in March.
Does it rain sometimes? It doesn't rain sometimes.
Does the sun shine every day? The sun doesn't shine every day.
Is it often cold in December,January and February? It's not often cold in December,January and February.

It's very pleasant.
否：It's not very pleasant
疑：Is it very pleasant?
It's often windy in March.
It's not often windy in March
Is it often windy in March?
It rains sometimes.
It doesn't rain sometimes
Does it rain sometimes?
The sun shines every day.
The sun doesn't shine every day.
Does the sun shine every day?
It's often cold in December,January and February.
It's not often cold in December,January and February.
Is it often cold in December,January and February?
新概念第一册50几课，一般现在时态......