I think it is his pen同义句

I think it is his pen同义句 I think it is his pen.(改为否定句） I _______ _____it_______his pe Is this his pen 改成同义句 This pen is his改成同义句 I think it is his think,i,pen,it,his,is. know,you,do,how,him?boy,friend,the,yo it is his pen改为肯定句 Whose pen is it?同义句 连词成句：think I pencil it his is his pen pai is from japan 改为同义句 I don't think he is as tall as his brother.同义句 I think it is wrong .改为同义句I_think it is_.