介绍兄弟姐妹

How old is your younger sister? 你妹妹几岁？
She's 5 years old. 她五岁了。
How much older than your brother are you? 你比你弟弟大几岁？
We are 3 years apart. 我们差三岁。
My brother is 3 years younger than me. 我弟弟比我小三岁。
My sister is 3 years older than me. 我姐姐比我大三岁。
Are you and your brother nice to each other?/Do you get along well with your brother?你跟弟弟处的好吗？
I always get in fights with my brother. 我总是跟弟弟打架。
My brother and I have a lot in common. 我和弟弟有很多共同点。
My brother and I are very different. 我和弟弟很不一样。
We are twins. 我们是双胞胎。
We are identical twins. 我们是同卵双胞胎。
We are different-looking twins. 我们是异卵双胞胎。
I miss my brother when he's not here. 弟弟不在这时，我会很想他。
My brother is a little troublemaker. 我弟弟是个小捣蛋鬼。
My brother is always monkeying around. 我弟弟总是到处胡闹。
My sister is in kindergarten./My sister goes to kindergarten. 我妹妹在上幼儿园。
My sister is in college./My sister goes to college. 我妹妹在上大学。
My brother is very nice to me. 我哥哥对我很好。