Final answer:
Future active participles in English grammar are formed by adding -ing to the base form of the verb and are used to describe future actions.
Step-by-step explanation:
In English grammar, future active participles are formed by adding the suffix -ing to the base form of the verb. They are used to describe an action that will happen in the future.
For example, in the sentence 'He is walking to school tomorrow,' the word 'walking' is a future active participle because it describes an action that will happen in the future.
Other examples of future active participles include: 'I am studying for the test,' 'She is writing a letter,' and 'They are cooking dinner tonight.'