1. I had to decline an invitation to my cousin's wedding because I was abroad.2. He declined a big job offer by a U.S. company because he wants to stay close to his family in Germany.3. Oftentimes, "yes" slips out our mouths before we have a chance to stop it, even if our hearts shout "no". Read this article to learn how to politely refuse something.
 to (politely) decline to politely refuse to refuse with courtesydecline 本身就有很有禮貌拒絕別人的意思，但如果你想強調 "禮貌"，前面可加上 politely 之類的副詞，如:I politely declined the low offer. = 我婉拒了那個低的出價
Don't dig yourself into a deeper ole by saying something stupid.