一个简单的英语语法 there has been heavy rain in South China recently为什么用there has been 不用there was

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一个简单的英语语法therehasbeenheavyraininSouthChinarecently为什么用therehasbeen不用therewas一个简单的英语语法therehasbeenhea

一个简单的英语语法 there has been heavy rain in South China recently为什么用there has been 不用there was
一个简单的英语语法
there has been heavy rain in South China recently
为什么用there has been 不用there was

一个简单的英语语法 there has been heavy rain in South China recently为什么用there has been 不用there was
因为后边出现了 完成时的标志 recently