雅思小作文二倍怎么表达

在雅思小作文中表达“二倍”可以使用以下几种句式：

1. 使用“double”或“twice”：

The number of students who attended the lecture was double that of last year.

2. 使用“be twice as...”：

The size of the new building is twice as large as the old one.

3. 使用“be two times as...”：

The cost of the product is two times as high as it was last year.

4. 使用“be twofold”：

The increase in sales was twofold compared to the previous year.

5. 使用“be three times as...”：

The population of the city has tripled since 1990.

请根据具体情况选择合适的表达方式。