Question

In which sentence is the underlined word a participle?

Jumping is the preschooler’s favorite activity.
He kept jumping my checkers with his king.
The kangaroos were jumping across the plain.
The jumping frog startled us as we walked by.

Answer 1

The underlined word is a participle in the following sentence: The jumping frog startled us as we walked by.

Step-by-step explanation:

"Jumping" is a present participle. Participle phrases may include objects and modifiers, yet in this case, the participle is not accompanied by any word. The participle is describing the noun head "frog", it is premodifying it, just as adjectives do. Participle phrases always function as adjectives by adding description to the sentence.

Answer 2

The jumping frog startled us as we walked by.