a dog is sitting on the mat中文和a dog is sits on te mat的区别

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adogissittingonthemat中文和adogissitsontemat的区别adogissittingonthemat中文和adogissitsontemat的区别adogissittin

a dog is sitting on the mat中文和a dog is sits on te mat的区别
a dog is sitting on the mat中文和a dog is sits on t
e mat的区别

a dog is sitting on the mat中文和a dog is sits on te 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.