The convertible car drove by with the top down.
Answer:
I said to him that we had to invite them to the party.
Answer:
Since the middle of the 20th century, scientists <u>have found</u> cures for many diseases. However, so far no one <u>has discovered</u>
Explanation:
those are the perfect tenses for (find) and (discover)
Participles come in two varieties: past and present. They are two of the five forms or principal parts<span> that every </span>verb has. They tell the time of when something happened. <span>Participles have three functions in sentences. They can be components of multipart verbs, or they can function as </span>adjectives<span> or </span>nouns<span>.</span>
