He works much, so he feels tired. (We can use "so" to connect the two clauses because they show cause and effect)
That computer doesn't work as well as this one. (This construction compares the two computers)
The bigger the apartment, the higher the rent. (This uses a comparative adjective with "the" before it)
The sooner we set off, the sooner we will arrive. (This uses repetition of "the sooner" for emphasis)
The better the joke, the louder the laughter. (This is a similar comparison to sentence 3)
The fatter she gets, the more tired she feels. (This uses "the more" with a comparative adjective)
The older he gets, the less he wants to travel. (This uses comparative and negative forms together)
The more difficult the games, the more excited the children are. (This uses "the more" with both the adjective and the adverb)
The more I meet him, the more I hate him. (Simple repetition of "the more" for emphasis)
The less time my boss has, the better he works. (This uses a comparative adjective with "the less")
The more books you read, the more knowledge you will have. (This uses "the more" with both a noun and an adjective)
The more he speaks, the more bored people feel. (This uses "the more" with a past participle adjective)