英语翻译Please forward a response by August 15,2007.是8月15号之前,还是在

y 介词 prep. 意为：not later than
“到…时（已发生某事）,此时谓语多用完成时；最晚、不迟于…,在…之前”.如：by now/then/this time/next Friday/the end of/three o`clock等.
· I shall be back by 5 o'clock.
最迟五点我一定回来.
· How many English parties had you had by the end of last term?
到上学期末,你们举行了几次英语晚会?

请在8月15之前回复

请在2007年8月15日之前

之前