✅ 同义词
🗣️ 情景例句
we don't have to.
我们不必勉强。
Thank you but this is something I have to solve by myself.
但有些事情我必须自己解决。
I am not sure whether I can lend you any money. I may not have enough.
我也不清楚能否借钱给你。我自己可能都不够。