很难的语法!非谓语动词 时态的几个语法问题,大师,

题目

很难的语法!非谓语动词 时态的几个语法问题,大师,
1.Being taken on time,this medicine will be quite effective.为什么?2.To finish the project in time,the staff were working at weekends.主句为什么用were,用are不行吗?3.Her giving me a sceond chance,I will do it better.这是非谓语动词的独立主格吗?her是不是改为she?4.To learn a language well,great efforts must be made.不定式做状语,逻辑主语必须一致吗?5.I would never come to this restaurant.书上说这句话中的would是过去表将来,我不再去餐馆,表示的不就是从现在到将来吗?难道是过了一段时间再回想之前?

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