you will be delighted/pleased etc to know (that)formalHAPPY used before you give someone information that they will be pleased to hear 你要是知道(…)准会高兴的 You will be pleased to know that we have accepted your offer. 你要是知道了准会很高兴的,我们已接受了你的提议。
→ you will be delighted/pleased etc to know (that) at know1(21)