Complete the sentence with the correct form of the verb in brackets: "They have ____ (put) the bikes in the storage room for the winter."
Correct answer
put
Explanation
This verb belongs to the small group whose three forms are identical, so after "have" the participle is spelled exactly like the base: no vowel changes and no ending is added. The regular spelling putted does not belong to this verb, and the surrounding auxiliary is what signals the perfect meaning.