A participle is a word formed from a verb that is used as an adjective or as a noun (such as <em>working class;</em>) these participles are also used to form compound verb forms (as <em>is playing; have gone</em>.) In the excerpt, the complete participle phrase is <u>walking shoes</u><u><em>.</em></u>
The main verb refers to the most important verb in a sentence or phrase. In this case, the verb is <u>be</u>.
A particle is typically used in any sentence to determine the form and structure of the given the word, noun, phrase of a verb. It has a similar role to the adjective or adverb. It is no infinite nature forms other verbs. Particles can be categorized into the past and future. Present describes the events that are happening and past defines events that have already been done. Participles may also be similar to past tense; however, the verbs have diverse features when used in participle form. Therefore reference will help in finding the correct type of a verb to be used.
