Is this a run-on sentence?
The first car that Mr. Castro bought is still the most precious in his collection it's a 1971 Chevrolet Chevelle.
yes no
A sentence is a group of words that expresses a complete thought.
The band I'm in has been rehearsing daily because we have a concert in two weeks.
A run-on sentence is formed when two sentences are run together, joined by just a comma or by no punctuation at all. If only a comma is used, the run-on is called a comma splice.
The band I'm in has been rehearsing daily, we have a concert in two weeks.
The band I'm in has been rehearsing daily we have a concert in two weeks.
There are several ways to fix a run-on sentence:
Use stronger punctuation, such as a period or a semicolon.
The band I'm in has been rehearsing daily. We have a concert in two weeks.
The band I'm in has been rehearsing daily; we have a concert in two weeks.
Use a comma and a coordinating conjunction to create a compound sentence. Coordinating conjunctions include and, but, or, and so.
The band I'm in has been rehearsing daily, and we have a concert in two weeks.
Use a subordinating conjunction or a relative pronoun to create a complex sentence. Subordinating conjunctions include after, although, as, because, before, if, since, unless, until, when, and while. Relative pronouns include that, which, who, whom, and whose.
The band I'm in has been rehearsing daily since we have a concert in two weeks.
This is a run-on sentence. It is formed from two sentences run together, joined without punctuation.
The first car that Mr. Castro bought is still the most precious in his collection it's a 1971 Chevrolet Chevelle.
Here is one way to fix the run-on sentence:
The first car that Mr. Castro bought is still the most precious in his collection; it's a 1971 Chevrolet Chevelle.