at n=no doing=as soon as?

at n=no doing=as soon as?
at the news ,he feel happy.---on hearing the news,xxxx
at thatDasiy cried,i'm sorry i didn;t know that

5．On/upon+动名词
On arriving at the village,we werewarmly welcomed by the villagers.
我们一到那个村子,就受到了村民们的热烈欢迎.
(注) on/upon+动名词这一句型多用来表示时间的短促和动
作的紧凑,这一介词短语一般放在句首.动名词也
可换用相应的名词,如上例可改成：
On/ Upon our arrival home,we were warmly greeted by ourparents.=As soon as we arrived home,we were warmly greeted by our parents.
一到家,我们就受到了父母的热烈欢迎.
句中的谓语动词用一般过去时：on后的动名词,
一般来自表示去向性动作的动词,如arrive,reach,return,leave等.
6．at+动名词
At seeing her mother,the girl burstinto tears.
一见到母亲,那女孩就放声大哭起来.
(注) at＋动名词和上述on+动名词多放在句首.
动名词也可换用相应的名词,如上例可改成：
At the sight of her mother,.句中的谓语动词用
一般过去时.at后的动名词,一般来自see,hear等
表示视、听感觉的动词.
例句：：at the news ,he feel happy.---on hearing the news,xxxxat tha tDasiy cried,i'm sorry i didn;t know that.They were very angry at the sight of （ =as soon as they saw ） the broken wind

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