Thanked. Or Have thanked.
The past tense and past participle are both "thanked".
No, "thanked" is not a linking verb. Linking verbs connect the subject of a sentence to a subject complement, such as in "She is happy." In "She thanked him," "thanked" is an action verb expressing an action performed by the subject.
Yes, thanked is past tense.
Thanked is one syllable. It is not thank ed.
The past tense of "thank" is "thanked."
The past participle of "thank" is "thanked."
He thanked her profusely.
According to legend the donkey wept when St. Francis thanked him.
thanked
I thanked her profusely.
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