nín / zhè me / rè qíng de / yāo qǐng / wǒ / yào shì / tuī cí / jiù / xiǎn de / què zhī bù gōng / le您这么热情地邀请,我要是推辞就显得却之不恭了。Since you invite me so warmly, if I decline it would seem rude.