On time: đúng lúc theo một lịch trình có sẵn, kế hoạch
In time: không có kế hoạch, lịch trình( kịp lúc để làm một hoạt động khác)
VD1 : Even though it rained, I still went to school on time
VD2: The test will start in 5 minutes. I hope he can arrive here in time
On time:dung luc,dung thoi diem va thoi gian da len ke hoach truoc do
In time:khong co lich trinh hoac ke hoach truoc do,vua kip luc de lam mot dieu gi do
Vd on time:She is a hard-working student,he is always goes to school on time
Vd in time:He rushed to catch the train and arrived at the station just in time for the departure