<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  What is a gerund in English grammar? Context: A gerund is an -ing verb form that acts as a noun in a sentence. Answer: [/INST]A gerund is a verb form ending in -ing that functions as a noun.</s>