没有untill这个词。until，介词、连词，作介词时意为“到……时，直到……为止”，作连词时意为“到……时，直到……为止”。
We didn't leave until the very end.
我们直到最后才离开。
We will explore every avenue until we find an answer.
我们要探索一切途径，直到找到答案为止。
Can you last until I can get help?
你能支撑到有人来帮我吗？
I won't go until I'm good and ready.
我要完全准备就绪后才走。
By law, you are a child until you are 18.
按照法律规定，18岁之前是未成年人。
Do this until we have no blurry spot.
这样做，直到我们没有模糊的斑点。
Until you return.
直到你回来。
Go down this street until you come to an overpass.
沿着这条街走下去，直到你看到一座天桥。
