(3)A is+倍数+the+名词(size，length，height 等)+of+B
(5)A is+倍数+what 引导的名词性从句
①This building is three times higher than that one.
This building is three times as high as that one.
This building is three times the height of that one.
②The output of this year is 3 times that of 2008.
=The output of this year is 3 times what it was in 2008.
③After the new technique was introduced，the factory produced twice as many cars in 2008 as the year before.
1.(When you study the local map, you’ll find this town is________.
A.twice the size of that one
B.twice as a large town as that
C.twice as larger as that one
D.twice as larger a town as that
解析：句意为：当你研究当地的地图时，你会发现这座城镇是那个的两倍大。倍数的表达方式：A is +倍数+the+名词(如size/length)+of B;B项中不定冠词位置错误;C、D项中as后应用形容词原级。
2. Peter’s jacket looked just the same as Jack’s, but it cost ________ his.
A.as much twice as
B.twice as much as
C.much as twice as
D.as twice much as
3. My uncle’s house in the downtown area is much smaller than ours，but it is twice_ _______expensive.
解析： 考查倍数表达法。这里的倍数是“twice”，由expensive这一原级可知，这里使用了“as...as...”这一比较结构，在具体的语境中，后面的一个as以及后面的成分可以承前省略，即这里expensive后面省略了as ours。