请问各位老师关于 动名词 的一些用法..谢谢...

请问各位老师关于 动名词 的一些用法..谢谢...
句中:
1)A friend of yours who lives in the country intends to come to town for a few days and has written to you asking if you could put him up.
2)Write him a letter of about 100 words offering him the use of your guestroom .
各位老师,我想请问下2个例句中 的动名词是做什么用法呢...asking 和 offering ...
谢谢各位老师解答...