🗣️ 情景例句
I can see that you've done this before.
我发觉你曾干过此事。
What track does the Metroliner leave from?
华纽特快从第几轨道开出？
We are all very excited and are looking forward to the Olympic Games because they have never been held before in this country.
我们都非常激动，盼望着奥运会的到来，因为在这个国家里还从未举办过奥运会。