“It is since” 与 “It has been” 的区别与用法

引言

在英语学习中,表达“自从……以来已经过去多长时间”是一个常见需求。 很多人会混淆 It is since...It has been... 的用法。 本文将简明解释两者的区别,并提供正确例句。

“It has been... since...” —— 正确且常用结构

这是标准英语中最常见的表达方式,用于说明从过去某一时间点到现在已经过去了多久。 它使用现在完成时(present perfect tense)。

例句:

  • It has been three years since I last saw her.
  • It has been a long time since we met.
  • It has been two weeks since the project started.

注意:主句用 It has been...,从句用一般过去时(如 I saw, we met)。

“It is... since...” —— 非正式或过时用法

在某些英式英语的非正式语境中,可能会听到 It is... 的说法, 但在标准书面英语和美式英语中,这种结构通常被认为是不规范的。

不太推荐的表达:

  • ❌ It is three years since I saw her. (口语中偶见,但不标准)

尽管母语者有时会这么说,但作为学习者,建议始终使用 It has been... 以确保语法正确。

总结

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