NOT TILL LATER 意思是不会太晚
not until later:句型1.It was not until sb1 did...that sb2 did...
eg. It was not until you came back that I went to bed.知道你回来我才去睡觉.
句型2(为句型1的倒装句)Not until sb1 did...,did sb2 do...
eg. Not until you came back,did I go to bed.
再如,It was not until midnight that I fall asleep.
Not until midnight did I fall asleep.
句型3,这个句型比较简单,也是最口语化的
主语+didn't+do+until...
eg.I didn't fall asleep until midnight.
I didn't go to bed until you came back
希望能帮到你!