许多绿树死了用英文怎么说

在英语中，"许多绿树死了"可以用以下几种方式表达：

Many of the green trees have died.
A lot of the green trees have passed away.
A significant number of the green trees have expired.

这些表达方式的来源都是英语中常用的表示死亡的词汇，如"die"（死亡）、"pass away"（过世）、"expire"（过期）等。

下面是一些例句：

Many of the green trees in the park have died due to the prolonged drought.
许多公园里的绿树因长期干旱而死亡。
A lot of the green trees in the city have passed away due to pollution.
城市里许多绿树因污染而死亡。
The prolonged heatwave has caused a significant number of the green trees in the forest to expire.
持续的高温已导致森林中许多绿树死亡。

在这些例句中，"the green trees"指的是具有绿色叶子的树木。