See this web page: http://www.english-test.net/forum/ftopic17263.html
and also:
pull down [phrasal verb]
1 pull down (something)orpull (something) downa: to move (something) down
▪ I pulled down the shade.▪ He always wears his baseball cap pulled down over his eyes.
b: to destroy (a building) completely
▪ The wreckers pulled down [=demolished] the building.
c: to make (something) smaller in amount or number : to reduce or lower (something)
▪ The rumors that the company was filing for bankruptcy pulled stock prices down.
▪ I pulled down the shade.▪ He always wears his baseball cap pulled down over his eyes.
b: to destroy (a building) completely
▪ The wreckers pulled down [=demolished] the building.
c: to make (something) smaller in amount or number : to reduce or lower (something)
▪ The rumors that the company was filing for bankruptcy pulled stock prices down.
2 pull down (someone)orpull (someone) downUS, informal: to cause (someone) to become sad or depressed
▪ The loss really pulled the team down. [=brought the team down]
▪ The loss really pulled the team down. [=brought the team down]
3 pull down (something)informal a: to earn (a particular and usually large amount of money)
▪ He pulls down [=makes, pulls in] more than a million dollars a year.
b: to get (something)
▪ The show has pulled down high ratings.
▪ He pulls down [=makes, pulls in] more than a million dollars a year.
b: to get (something)
▪ The show has pulled down high ratings.
