i don't know how they decided 还是 decide 时态怎么用呢

i don't know how they decided 还是 decide 时态怎么用呢
i don't know how they decided 还是 decide 时态怎么用呢

i don't know how they decided 还是 decide 时态怎么用呢
这个主要看你想表达的中文意思是什么?
他们是如何决定的 --- 用decided
他们将如何决定 -- how will they decide
其实更地道,跟简单的表达是,I don't know what their decisions are.
如果是过去的决定,则用 I don't know what their decisions were.

decide 啊，how they decided 是宾语从句。做know的宾语。整个句子是don't是现在时态，一般从句也是现在时态。

不过我现在有的题目从句与主句的时态不同啊