比原来增长了3倍用英语怎么说

Three times as long as
或two times longer than

three times more than before/ three times as before

increase1
KK: []
DJ: []
vt.
1. 增大;增加;增强
Travel increases one's knowledge of the world.
旅游增进人对世界的了解。
vi.
1. 增大;增加;增强
Foreign investments there increased five times.
那里的外国投资增加了五倍。
2. 增殖
These flowers will increase every year.
这些花会年复一年越长越多。

美国人最简单的用法就是 increase 3 times

绝对正确

three times longer than before
as four times long as before
增长了三倍就是以前的四倍，如果是增长到3倍那就是3倍

increase 3 times