1. THAT
1.1. BE CAREFUL !!
1.1.1. THAN is the word usually used in comparisons
1.1.1.1. RIGHT : London is bigger THAN Belfast .
1.1.1.2. WRONG : London is bigger that Belfast .
1.2. OK
1.2.1. SO + ADJECTIVE + THAT.......
1.2.1.1. I was so annoyed that I slammed the door . It was so cold that we wrapped a blanket around ourselves.
2. THAN
2.1. MORE or LESS
2.1.1. +
2.1.1.1. He is more intelligent than his brother . His new car is smaller than his old one.
2.1.2. -
2.1.2.1. They are less hard-working than the other class.
2.1.2.2. She is less tolerant than her daughter.
2.2. NEGATIVE WORD (NO / NOTHING) + ADJECTIVE +THAN
2.2.1. NO / NOT ANY + COMPARATIVE ADJECTIVE + THAN
2.2.1.1. He`s no better than Jill is . OR He's not any better than Jill is.
2.2.2. SENTENCE STARTER
2.2.2.1. NOTHING + COMPARATIVE + VERB PHRASE + THAN
2.2.2.1.1. Nothing better illustrates TV’s lush treacle homage to the landed gentry than Downton Abbey
2.2.2.1.2. Nothing proves you love someone more than making them pancakes for breakfast.
2.2.2.2. THERE'S NOTHING + COMPARATIVE + THAN
2.2.2.2.1. There's nothing worse than waiting and not knowing what'll happen to you.
2.3. OTHER STRUCTURES
2.3.1. I'd rather stay in than go to the party. No sooner had they arrived than the dog began to bark.
3. AS
3.1. DON`T FORGET
3.1.1. THE SAME AS ...
3.1.1.1. She has the SAME dress AS Cynthia has. He is the SAME age AS his boss.
3.2. AS + ADJECTIVE + AS
3.2.1. SIMILE
3.2.1.1. She was AS white AS a sheet . He is AS blind AS a bat.
3.3. COMPARATIVE OF EQUALITY
3.3.1. AS + ADJECTIVE + AS
3.3.1.1. She is AS tall AS her mother . OR She is the SAME height AS her mother.
3.4. COMPARATIVE OF INFERIORITY
3.4.1. NOT AS + ADJECTIVE +
3.4.1.1. Mataró is NOT AS polluted AS Barcelona.
3.5. SUCH AS (for giving a list of examples)
3.5.1. The shop specialises in tropical fruits, SUCH AS pineapples, mangoes and papayas. (such as = for example)
3.5.2. WRONG : The shop specialises in tropical fruits, as pineapples, mangoes and papayas.
4. TO
4.1. SIMILAR TO
4.1.1. His new album is SIMILAR TO the previous one .
4.1.2. NOTE
4.1.2.1. DIFFERENT FROM
4.1.2.1.1. The EOI is DIFFERENT FROM most language schools.