Phrasal Verbs

Phrasal verbs are usually two-word phrases consisting of verb + adverb or verb + preposition.

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."

1) Drop off – similar to fall

The boys dropped stones off the cliff

2) Drop off – fall asleep

I dropped off while watching TV last night

Here are another 3 possible meanings for this phrasal verb.

3) Drop off- gradually decline/ become less
Sales dropped off at the end of the month

4) Drop off- stop somewhere for someone
Could you drop me off at the station?

5) Drop off- stop and give something to someone
Could you drop this letter off at the post office for me?

see through, has two meanings. You can probably guess both meanings from the picture. Here's an explanation to help you out, just in case.

Of course, we can use see through to mean 'look through':

'The window is too dirty. I can't see through it.'

See through, when used as a phrasal verb, also means to be aware that someone is trying to lie or fool you:

'The teacher could see through her student’s excuse very easily.'

In the cartoon, the ghost's wife (do ghosts have wives?!) can see that he is trying to lie to her – she can see through his story.

courtesy

http://www.englishclub.com/vocabulary/phrasal-verbs-list.htm
http://www.ecenglish.com/learnenglish/category/subjects/vocabulary/cartoon?page=5
http://www.eslcafe.com/pv/pv-d.html