How do you say

He plans to buy a new sweater for the winter.

..in Chinese?

他打算买一件新毛衣来度过冬天

tā dǎ suàn mǎi yī jiàn xīn máo yī lái dù guò dōng tiān

How do you say "This sofa that I bought three months ago is very comfortable to sit on." in Chinese?