Linking verbs link or connect the subject of a sentence with an adjective, noun, or pronoun that follows the linking verb. This occurs most frequently with the verb to be:
As the linking verb changes tenses, it has no effect on the other elements in the sentence:
In informal or casual style, it is common to use an objective-case pronoun after to be. In formal style, subjective-case pronouns are used. This is true in all tenses:
Other linking verbs work in the same manner as to be: they combine the subject of a sentence with an adjective that follows the verb. Some of these linking verbs can also be combined with nouns and pronouns that follow the verb. The verbs that are followed only by adjectives are:
appear
seem
feel
smell
grow
sound
look
stay
prove
taste
Each of these ten verbs can be followed by an adjective that modifies the subject of the sentence, and this can occur in any tense and with auxiliaries:
Two linking verbs (to become and to remain) can be followed by adjectives, nouns, and on rare occasions pronouns and can be used in any tense and with auxiliaries. For example:
The verb to seem can sometimes be followed by a modified noun rather than just an adjective:
Some of the linking verbs can also be used as transitive verbs. That is, they do not combine a subject with an adjective that follows them, but, instead, they take a direct object. Compare the following sentences:
Linking Verb: She feels happy.
Transitive Verb >> She feels the fabric. (direct object)
Linking Verb: The cake smelled burned.
Transitive Verb >> Bill smelled the fl owers. (direct object)
Linking Verb: It grows dark.
Transitive Verb >> They grow tropical plants. (direct object)
Linking Verb: The music sounds loud.
Transitive Verb >> He sounds the alarm. (direct object)
Linking Verb: It proved wrong.
Transitive Verb >> She proved the theory. (direct object)
Linking Verb: The soup tastes salty.
Transitive Verb >> Mom tastes the soup. (direct object)
It is easy to determine whether these verbs are used as linking verbs or as transitive verbs. Replace the verb with an appropriate form of to be. If the sentence still makes sense, the verb is a linking verb. If it makes no sense, the verb is a transitive verb. For example:
The verb to appear must be mentioned specially. Although it does not function as a transitive verb, it can be used as a verb that shows the action of appearing and is in such a case not a linking verb. Compare the following pairs of sentences:
Something similar can occur with the verbs to stay or to remain: