নিচের কোনটি Adverb?

The up train is late. এখানে 'up' শব্দটি- The boy writes well. Here well is a/an Thank you very much"- এ বাক্যে very শব্দটি একটি- The adjective took place long ago. Here the word 'ago' is a/an- An adverb does not modify - He runs fast, here 'fast' is ..... Piya has slept only three hours. Which part of speech is the word only here? Which one of the following is an adverb ? A burnt child dreads the fire. Here 'burnt' is a/an- Please look above. Here above is -