Can compound sentences have three clauses?

No, a compound sentence can be short if it has two independent clauses.

Example: I came, and I saw.

Punctuation is crucial in compound sentences:

1. Use a comma before the coordinating conjunction if both clauses are independent.

Example: I was late, but I still made it to class.

2. Use a semicolon when you don't use a conjunction.

Example: She loves books; he prefers movies.

3. Use a semicolon + conjunctive adverb + comma when using adverbs like however, therefore, moreover, nevertheless.

Example: He was tired; however, he continued working.

Avoid comma splices, which occur when two independent clauses are joined with only a comma.

Coordinating conjunctions are words that connect words, phrases or clauses of equal importance. The most common coordinating conjunctions are remembered by the acronym FANBOYS:

F: For (cause)

A: And (addition)

N: Nor (negative addition)

B: But (contrast)

O: Or (choice)

Y: Yet (contrast, similar to 'but')

S: So (result)

Example: I wanted to study, but I was too tired.

Here are some books that students can consider for studying imperative sentences in detail: