a dog is sitting on the mat中文和a dog is sits on t
问题描述:
a dog is sitting on the mat中文和a dog is sits on t
e mat的区别
答
sit是动词,前面不能直接加is,所以第二种说法是错误的.
a dog is sitting on the mat中文和a dog is sits on t
e mat的区别
sit是动词,前面不能直接加is,所以第二种说法是错误的.