1. If you <u>could</u> let us know your decision as soon as possible, it <u>would</u> be a great help.<br/><br/>2. If you <u>can</u> let us know your decision as soon as possible, it <u>will</u> be a great help.<br/><br/><font color="#0000ff">What is the difference between the two? Does 1 refer to an imaginary situation while 2 refers to an actual one?</font>