The verb and the subject within a sentence must agree in number. Thus, a singular subject takes a singular verb and a plural subject takes a plural verb.
At its most basic level, a sentence is a sequence of words that conveys a complete thought.
Parallel structure is using a consistent format for each idea, whether words, phrases, or clauses.
Modifiers are describing words.
A conditional sentence describes a condition that is necessary for a particular outcome to occur.
A comma splice is a common writing error that occurs when two or more independent clauses in a sentence are incorrectly connected by a comma
A clause is a group of words that contains a subject and a predicate (which contains a verb). A clause can make up part of a sentence, or it can be a sentence on its own.
A, an, and the are articles placed before a noun and any modifiers that refer to that noun.
Apostrophes are used to form contractions, to show possession, and to make a noun ending in s plural.