1) Have you ever studied abroad?
你以前留过学吗?
2) Did you know English ?
你以前懂英文吗?
3) Will you stay the night?
你将留宿过夜吗?
4) Had she seen him before ?
她以前见过他吗?
5) I had not seen you formerly.
我以前没见过你。
6) Have you learned any Chinese?
你学过中文吗?
参考词条