I'll let father know as soon as l__(hear)from you

I'll let father know as soon as l__(hear)from you
I'll let father know as soon as l__(hear)from you

I'll let father know as soon as l__(hear)from you
I'll let father know as soon as l_hear_(hear)from you

hear ，这是一个主将从现的句子。我收到你的来信就会让我父亲知道。as soon as 引导的从句用一般现在时

hear
as soon as 等于when 的用法 ，从句用一般现在时表示将来