Helping verbs<span> are </span>verbs<span> that, as their name suggests, help the main </span>verb<span> in a sentence by extending the </span>meaning<span> of the </span>verb<span>. They add detail to how time is conveyed in a sentence... from google
the best awnser is a</span>
"a new pair of shoes" is the object of the preposition because it answers the question 'what did Wilmer buy?"
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