Answer:
Step-by-step explanation:
Present participle phrases and gerund phrases are easy to confuse because they both begin with an ing word. The difference is the function that they provide in a sentence. A present participle phrase will always act as an adjective while a gerund phrase will always behave as a noun.
It is more suitable to use the gerund form of the verb following the main verb, if the main verb is in the past tense (here, "finish")