Since then,it_______every 4 years.为什么填is held而不是has been heldsince then不是现在完成时时间状语吗 为什么不能填写has been held?

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Since then,it_______every 4 years.为什么填is held而不是has been heldsince then不是现在完成时时间状语吗 为什么不能填写has been held?
Since then,it_______every 4 years.为什么填is held而不是has been held
since then不是现在完成时时间状语吗 为什么不能填写has been held?

Since then,it_______every 4 years.为什么填is held而不是has been heldsince then不是现在完成时时间状语吗 为什么不能填写has been held?
every 4 yeaars明显是一般现在时时态
since then只是时间状语,不是决定性因素,要看后面的时态标志词
而且“至今、每四年举办一次”（这是奥运会?）显然是叙述一个客观事实,也应用一般现在时

But then /Before then / Since then/ Until 翻译：ever since then ever since then since then可以说成 since that time 从那以后是from then还是since then? since then 是啥意思? ----------------you----------------(know)him since then since then 与since ever有什么区别? since then 和since that有什么区别? since then 与since ever有什么区别? Since that和 since then是一样的吗?为什么? since then后接什么时态 since then加一个一般疑问句吗 Since then,only you in my inadverently broke my heart,since then翻译 ten years _____(pass) since then. she has lost touch since then 翻译 Since then,he____(live)in Huaian.