Answer:
1. Positive, Negative and Positive/Negative.
2. Drive the car fast if you want to catch the flight.
3. Adverbs of manner are usually formed by adding '-ly' to the adjective: careful → You should drive carefully at night. polite → Mary looks sad. Could you ask her politely, what has happened to her?
4. To tell us how something happens, such as whether it was quickly or slowly.
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