It wasn t until意思

"It wasn't until" is a construction used to indicate a point in time when something happened or became clear. It is used to emphasize that something occurred later than expected or after a certain condition was met. The structure is typically followed by a past tense clause that provides the specific moment or condition.

Here's an example:

"It wasn't until she saw the doctor's report that she realized the seriousness of her condition."

In this sentence, "it wasn't until" is used to emphasize that the realization of the seriousness of her condition occurred after seeing the doctor's report. Without this construction, the sentence would simply state that she realized the seriousness of her condition, without specifying when that realization happened.

The "it wasn't until" construction is a useful way to add emphasis to the timing of an event or realization.