Simple Examples:
* My sister is a doctor. (Subject: My sister, Linking Verb: is, Predicate Nominative: doctor)
* The answer is obvious. (Subject: The answer, Linking Verb: is, Predicate Nominative: obvious)
* He seems happy. (Subject: He, Linking Verb: seems, Predicate Nominative: happy)
* This book is a gift. (Subject: This book, Linking Verb: is, Predicate Nominative: a gift)
More Complex Examples:
* The most important thing is honesty. (Subject: The most important thing, Linking Verb: is, Predicate Nominative: honesty)
* Your plan sounds like a great idea. (Subject: Your plan, Linking Verb: sounds, Predicate Nominative: a great idea)
* That building over there is the new city library. (Subject: That building over there, Linking Verb: is, Predicate Nominative: the new city library)
Remember:
* Linking verbs connect the subject to a word or phrase that renames or describes the subject. Common linking verbs include: *be, seem, appear, become, feel, look, sound, smell, taste, remain, grow, stay, turn*.
* Predicate nominatives are nouns or pronouns that rename the subject. They are always in the same case as the subject.
Let me know if you'd like more examples or have any other questions!