TRỪ KHI = “IF…NOT”  UNLESS HE GETS UP EARLY, HE TRONG MỆNH ĐỀ PHỤ WILL BE LATE FOR SCHOOL - IF YOU LIKE READING BOOKS, YOU WILL LEARN MANY USEFUL THINGS IN - “ WHEN” DÙNG ĐỂ THAY THẾ CHO “IF ” TRONG LIFE

1. “ Unless”: trừ khi = “if…not”  Unless he gets up early, he trong mệnh đề phụ will be late for school - If you like reading books, you will learn many useful things in - “ When” dùng để thay thế cho “If ” trong life