I went to bed to sleep.

Meaning: This sentence is describing how the speaker moved from one place to a piece of furniture that is used for sleeping for the purpose of resting with their eyes closed.

Choice of Words: I is a pronoun that refers to the speaker. Went is the past tense of the verb "to go", which means to move from one place to another. To is a preposition that indicates the destination or purpose of an action. Bed is a piece of furniture that is used for sleeping. To is an infinitive marker that introduces a verb. Sleep is a verb that means to rest with your eyes closed. So, "I went to bed to sleep" means I moved from one place to a piece of furniture that is used for sleeping for the purpose of resting with my eyes closed.

Alternative Expressions

I hit the hay to catch some Zs.

Meaning: This means that the speaker is going to bed in order to sleep.

Choice of Words: I refers to the person speaking, hit the hay is a slang term for going to bed, to catch is a verb that means to grab or hold something, and Zs is a slang term for sleep. When you put them together, "I hit the hay to catch some Zs" means that the speaker is going to bed in order to sleep.

I'm off to dreamland.

Meaning: This means that the speaker is going to bed in order to sleep.

Choice of Words: I'm is a contraction of the words "I am", off is a preposition that means away from, and dreamland is a metaphorical place where people go when they sleep. When you put them together, "I'm off to dreamland" means that the speaker is going to bed in order to sleep.

Related Expressions