数字 + times + as + 原级 + as +比较对象
It cost three times as much as I had expected.
Cats sleep twice as much as people.
Unemployment among blacks was twice as high as that for white.
New drivers have twice as many accidents as experienced drivers.
数字 + times + the size / length / depth / height / width / quantity / amount / etc+ of +比较对象
Their house is twice the size of ours.
The queen bee is twice the length of a worker bee.
Many are holding out for ten times the price.
This room is twice the length of the other, but much narrower.
Concorde crosses the Atlantic at twice the speed of sound.
The soil contains 30 times the acceptable level of radioactivity.
Air pollution in the city had reached five times the acceptable levels.