Linking Verbs: The Giant Equal Sign 

     Linking verbs are also called being verbs because they express states of being what is, will be, or was. Here's where algebra intersects with English. You can think of linking verbs as giant equal signs plopped into the middle of your sentence. For example, you can think of the sentence
Legghorn's uncle is a cannibal with a taste for finger food,
as
Legghorn's uncle = a cannibal with a taste for finger food.
Or, in shortened form,
Legghorn's uncle = a cannibal
Just as in an algebra equation, the word is links two ideas and says that they are the same. Thus, is is a inking verb. Here are more linking verbs:
Lulu will be angry when she hears about the missing bronze tooth.
Lulu = angry (will be is a linking verb)
Lochness was the last surfer to leave the water when the tidal wave
approached.
Lochness = last surfer (was is a linking verb)
Even in the dark, Lucrezia's red hair and orange eyes were completely
visible.
hair and eyes = visible (were is a linking verb)
Ludwig has been depressed ever since the fall of the House of Usher.
Ludwig = depressed (has been is a linking verb)
Earwigs are a constant problem for that pink elephant.
Earwigs = problem (are is a linking verb)