第1个回答 2008-03-17
I have made this decision in secret.
第2个回答 2008-03-17
I had secretly done a decision
第3个回答 2008-03-17
I have made a decision by stealth.
第4个回答 2008-03-17
楼上的呀~
此句型须用现在完成时,即“have + 过去分词”
第5个回答 2008-03-17
I have already secretly done to decide
参考资料:金山快译