as1 + 形容词或副词原级 + as 1）在否定句或疑问句中可用so… as.
He cannot run so/as fast as you.
2）当as… as 中间有名词时采用以下格式。
as +形容词+ a +单数名词
as + many/much +名词
This is as good an example as the other is.
I can carry as much paper as you can……
This room is twice2 as big as that one.
Your room is the same size3 as mine.
4）倍数+ as + adj. + as <=> 倍数+ then + of
This bridge4 is three times as long as that one.
This bridge is three times the length5 of that one.
Your room is twice as large as mine.
Your room is twice the size of mine.
比较级形容词或副词 + than
You are taller than I.
They lights in your room are as bright as those in mine.
（错）He is more cleverer than his brother.
（对）He is more clever than his brother.
（对）He is clever than his brother.
（错）China is larger that any country in Asia6.
（对）China is larger than any other countries in Asia.
The population7 of Shanghai is larger than that of Beijing.
It is easier to make a plan8 than to carry it out.
Which is large，Canada or Australia？
Which is the larger country，Canada or Australia？
She is taller than her two sisters.
She is the taller of the two sisters