attheideaof,atthementionof,atthetouthofattheideaof,atthementionof,atthetouthof,atthesoundof关于这种用法里面的mention,sound这些词的名词还是动词呢?atthe（动词还是名词）of还有attheideaof和atthe

Question

at the idea of,at the mention of,at the touth of
at the idea of,at the mention of,at the touth of,at the sound of
关于这种用法 里面的mention,sound这些词的名词还是动词呢?at the（动词还是名词） of
还有at the idea of和at the thought of 这2个有什么区别

Answer 1

mention,sound都是名词
at the ( ) of 既有介词 at,又有定冠词the,括号内必须是名词形式,一般来说都是名词,动名词理论上讲可以,但用到的几率几乎为0
at the idea of 一想起…（就）≈at the thought of