Which sentence expresses a complete thought

Although they said hello.

After they spoke to each other.

As soon as they recognized each other.

As soon as they saw each other, they said hello.

Question

Which sentence expresses a complete thought

Although they said hello.

After they spoke to each other.

As soon as they recognized each other.

As soon as they saw each other, they said hello.

Vocaloid · Answer

So to start off with, you need a subject + predicate for an independent clause. however, if you add a subordinating conjunction, that turns the independent clause into a dependent clause, which is an incomplete thought. so, if you have a dependent clause, you need to add an another independent clause to complete the sentence.

with all that in mind, try to identify which of the choices is ***complete***. as a hint, you should be looking for either 1) an independent clause, 2) an independent + dependent clause connected by a subordinating conjunction, or 3) independent clauses connected by a coordinating conjunction.