Conjunction

TYPE	EXAMPLE
Contrast	but, yet, while, whereas, however, nevertheless, nonetheless, on the other hand, on the contrary, although, even though, though, despite, in spite of, despite the fact that, in spite of the fact that, etc.
Cause	because, because of, due to, since, as, because of the fact that, owing to, owing to the fact that, etc.
Addition	and, besides, in addition to, as well as, moreover, furthermore, etc.
Result	so, so … that, such … that, therefore, hence, consequently, that is why, etc.
Purpose	so that, in order that, in the hope that, to + verb1, etc.
Condition	if, unless, even if, only if, if only, provided that, providing that, as long as, so long as, on condition that, etc.
Choice	or, otherwise, or else, etc.
Time	after, before, since, until, when, while, till, as, etc.
Manner	as, as if, as though, etc.

Correlative Conjunction

1.    both ___ and 2.    either ___ or 3.    neither ___ nor 4.    whether ___ or

5.    so ___ that 6.    such ___ that 7.    not only ___ but also  not only ___ but ___ as well

Modal Perfect

Study these sentences.  Pay special attention to the words in bold.

1.     The window is open. The thief must have entered the room through the window. (I am sure that the thief entered through the window.) 2.   Jack was absent yesterday. He might have been ill. (May be he was ill.) 3.   He doesn’t know about the accident. You should (ought to) have told him about it yesterday. 4.   I waited for you until noon but you didn’t show up. You should (ought to) have informed me that you couldn’t come. 5. I was sleepy at the party. I could have taken a nap before the party. ( but I didn't take a nap)