倍數(shù)表達(dá)法：
 A + 謂語+倍數(shù)+the +n.(size/ height/ length……)+of B
 A + 謂語+倍數(shù)+as + abj.+ as B
 A + 謂語+倍數(shù)+adj.比較級(jí)+than B A + 謂語+adj.比較級(jí)+than B+by+倍數(shù)
1).This square is twice the size of that one.
 This square is twice as large as that one.
 This square is once larger than that one.
2).This factory produced three times as many cars as they did 10 years ago.
3).He is 3 years older than I- He is older than I by 3 years