Final answer:
A run-on sentence is a sentence that contains two or more complete sentences without any proper punctuation or words to connect them. To fix a run-on sentence, you can add a coordinating conjunction, use a period, separate with a semicolon, or turn one sentence into a subordinate clause. Commas should be used correctly, including after a subject or a verb. Subject-verb agreement is important to ensure the correct form of the verb is used with the subject.
Step-by-step explanation:
A run-on sentence is a sentence that contains two or more complete sentences without any proper punctuation or words to connect them. To fix a run-on sentence, you can add a coordinating conjunction (such as 'and' or 'but'), use a period to create two sentences, separate the sentences with a semicolon, or turn one of the sentences into a subordinate clause. For example, 'I went to the store I bought some milk' can be fixed by adding a coordinating conjunction: 'I went to the store and I bought some milk.'
Comma errors can also make sentences choppy and unclear. It is important to use commas correctly, including using a comma after a subject or a verb.
It is essential to use subject-verb agreement correctly in a sentence. Sometimes a long phrase or clause can separate the subject from the verb, but it is important to identify the actual subject of the sentence and use the appropriate form of the verb.