Agreement of the verb with the subject

Basic Rule. A singular subject (she, Bill, car) takes a singular verb (is, goes, shines), whereas a plural subject takes a plural verb.

Example: The list of items is/are on the desk

Rule 1. A subject will come before a phrase beginning with of. This is a key rule for understanding subjects. The word of is the culprit in many, perhaps most, subject-verb mistakes.

Incorrect: A bouquet of yellow roses lend color and fragrance to the room.

Correct: A bouquet of yellow roses lends . . . (bouquet lends, not roses lend)

Rule 2. Two singular subjects connected by or, either/or, or neither/nor require a singular verb.

Examples:
My aunt or my uncle is arriving by train today.
Neither Juan nor Carmen is available.
Either Kiana or Casey is helping today with stage decorations.

Rule 3. The verb in an or, either/or, or neither/nor sentence agrees with the noun or pronoun closest to it.

Examples:
Neither the plates nor the serving bowl goes on that shelf.
Neither the serving bowl nor the plates go on that shelf.

Rule 4. As a general rule, use a plural verb with two or more subjects when they are connected by and.

Example: A car and a bike are my means of transportation.

Exceptions:
Breaking and entering is against the law.
The bed and breakfast was charming.

Rule 5. Sometimes the subject is separated from the verb by such words as along with, as well as, besides, not, etc. These words and phrases are not part of the subject. Ignore them and use a singular verb when the subject is singular.

Examples:
The politician, along with the newsmen, is expected shortly.
Excitement, as well as nervousness, is the cause of her shaking.

Rule 6. In sentences beginning with here or there, the true subject follows the verb.

Examples:
There are four hurdles to jump.
There is a high hurdle to jump.
Here are the keys.

Rule 7. Use a singular verb with distances, periods of time, sums of money, etc., when considered as a unit.

Examples:
Three miles is too far to walk.
Five years is the maximum sentence for that offense.
Ten dollars is a high price to pay.
BUT
Ten dollars (i.e., dollar bills) were scattered on the floor.

Rule 8. With words that indicate portions—e.g., a lot, a majority, some, all—Rule 1 given earlier in this section is reversed, and we are guided by the noun after of. If the noun after of is singular, use a singular verb. If it is plural, use a plural verb.

Examples:
A lot of the pie has disappeared.
A lot of the pies have disappeared.