例句为：A是B的两倍大
具体：
1·主语+谓语+倍数+as+adj.+as
A is twice as big as B
2·主语+谓语+倍数+the size of
…
A is twice the size of B
3·主语+谓语+倍数+adj./adv.比较级+than…
A is twice bigger than B
例句为：A是B的两倍大
具体：
1·主语+谓语+倍数+as+adj.+as
A is twice as big as B
2·主语+谓语+倍数+the size of
…
A is twice the size of B
3·主语+谓语+倍数+adj./adv.比较级+than…
A is twice bigger than B