If you are glad about something, you are happy and pleased about it.
The people seem genuinely glad to see you.
人们看到你似乎真得很高兴。
I'd be glad if the boys slept a little longer so I could do some ironing.
如果男孩子们多睡一会儿我就高兴了,那样我可以熨熨衣服。
If you say that you will be glad to do something, usually for someone else, you mean that you are willing and eager to do it.
I'll be glad to show you everything.
我很乐意为您做全面的介绍。