i'm afraid all my efforts were in vain为什么用过去式

i'm afraid all my efforts were in vain为什么用过去式 i am afraid all of my efforts were in vain.这句话的主谓宾是什么? I regret saying that all my efforts were in vain.如何改错句? All these efforts were in vain..是啥子意思? all my ____(努力）were in vain i was also afraid to speak in class afraid为什么用过去式 英语翻译翻译成英文是All the efforts are in vain,这个句子用过去时行吗,把 All 改成 Al The final success here,for my efforts not in vain,and the la Through my efforts,I finally succeeded 中success为什么加ed是因为过去式还 英语翻译In spite of all my efforts not to appear too nervous,I c i'm afraid all the preparations we have made were for ___bec 1.I'm afraid they can't get in all the rice in a week_____to