英語用字的問題

elder sister 係姐姐
younger sister 係妹妹

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問番佢大過你定細過你

For siblings older then you, you may use "elder sister" or "cousin".
For siblings younger than you, you may use "younger sister" or "sister"
However, many people are using "cousin" for both meanings nowadays.

u can ask her is her sister a younger or elder one.

您可以在上文下理中找出答案的，如果真係冇講的話便沒法了！

您可以問番佢..
Is older or younger?
佢就會答番您
is older/younger sister.

你可以答:she is my elder sister/she is my younger sister.唔知咁答可唔可以幫到你呢~