Not until什麼意思

"Not until" is a phrase in English that is used to indicate a point in time before which something does not happen. It is used to express a condition or a situation that must be met before a certain action can occur. The structure of the phrase is negative, meaning that the action will not occur until the condition is met.

Here are a few examples of how "not until" can be used:

1. "I won't go to bed until I finish my homework."
2. "The meeting won't start until everyone arrives."
3. "Not until tomorrow will we know the results."
4. "The store doesn't open until 10 a.m."

In each of these examples, the action (going to bed, the meeting starting, knowing the results, the store opening) will not occur until the specified condition (finishing homework, everyone arriving, tomorrow, 10 a.m.) is met.