had you not given me a hand today ,I would not have finished my task so efficiently
http://tw.blog.voicetube.com/archives/17088
I would not have finished my task so efficiently had you not given me a hand today.
如果你今天沒有幫我,我將無法有效率地完成我的任務。
19.I would not have finished my task so ..-阿摩線上測驗