... trước danh từ đại từ For Things: Which, That (subject or object), Of which, with which, in which, (= whose: instead of things and animals), Upon which, on which, about which (thay cho danh từ đại ... orders this disaster wouldn‟t have happened Should you require anything, think carefully before telling me UNLESS = IF… NOT : Nếu… không Ex: If you don‟t study harder, you won‟t pass this exam ... It is such This shirt is very old She shouldn‟t wear it This shirt is too This shirt is not……………………………… enough……………………… (new) This shirt is so ...