Is that your pen？的同义句是什么？？

Question

讲的越详细越好！！急

Answer 1

Is thar pen yours?

yours 名词性代词 意为 你（们）的
比如
The pen is yours=It is your pen

Answer 2

Is that your pen？的同义句是什么？
Is that pen yours ？
要注意 I 要大写，句后用问号。