用but造句三个,短一点

I can't help you,but my mom can。我不会帮你,但是我妈妈可以。I like this book,but it's too expensive。我喜欢这本书,但是它太贵了。I'd like to go to the cinema with you,but I am too busy now。我想和你一起去电影院,但我现在太忙了。