The Universe of Discourse : Phrasal verbs

The Universe of Discourse : Phrasal verbs: "My mom teaches English to visiting foreign students, and last time I met her she was talling me about phrasal verbs. A phrasal verb is a verb that incorporates a preposition. Examples include 'speed up', 'try out', 'come across', 'go off', 'turn down'. The prepositional part is uninflected, so 'turns down', 'turned down', 'turning down', not *'turn downs', *'turn downed', *'turn downing'. My mom says she uses a book that has a list of all of them; there are several hundred. She was complaining specifically about 'go off', which has an unusually peculiar meaning: when the alarm clock goes off in the morning, it actually goes on."

Somebody set us up the bomb.