请用主语（人,物）+be(am.is.are)+表语（名词.形容词）.用肯定,否定.疑问造句

请用主语（人,物）+be(am.is.are)+表语（名词.形容词）.用肯定,否定.疑问造句

肯定：Tom is a student.
否定：Ben is not shy.
疑问：Is it your pen?

Lisa is the most beautiful girl in our class.
You are dishonest to tell the lie.
Is he the tallest boy in our grade?
望采纳，希望帮到你。