is your sister writing carefully in the study

问题描述:

is your sister writing carefully in the study
这句话有什么错误?

语法没有错误呀,句子开头第一个字母要大写,即is -> Is ,句末要加?
Is your sister writing carefully in the study?
你姐姐正在书房认真写字吗?
加油!不明白再问!