短语动词学习（A）
act up (no object): misbehave (for people); not work properly (for machines).\"The babysitter had a difficult time. The children acted up all evening.\"
\"I guess I'd better take my car to the garage. It's been acting up lately.\"
http://www.eslcafe.com/pv/3di.gifact like (inseparable): behave in a way that's like _____ .
\"What's wrong with Bob? He's acting like an idiot.\"
Note: This phrasal verb is very informal.
http://www.eslcafe.com/pv/3di.gifadd up (1. no object): logically fit together.
\"His theory is hard to believe, but his research adds up.\"
Note: This phrasal verb is often negative.
\"His theory seems, at first, to be plausible, but the facts in his research don't add up.\"
http://www.eslcafe.com/pv/3di.gifadd up (2. separable): find the total.
\"What's the total of those bills? Could you add them up and see?\"
http://www.eslcafe.com/pv/3di.gifadd up to (inseparable): to total.
\"The bills add up to $734.96. That's more than I expected!\"
http://www.eslcafe.com/pv/3di.gifask out (separable): ask for a date.
\"Nancy has a new boy friend. Joe asked her out last night.\"
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