1. I had my bag stolen.
我的包被偷了。
还能这样说：
My bag was stolen.
Somebody stole my bag.
应用解析：
steal a march (on sb.) 偷偷地抢在某人之前；
steal sb.'s heart 巧妙地；博得某人的欢心；
steal into one's heart 渐渐进入心里
2. I had my luggage lost.
我的行李丢了。
还能这样说：
I had lost my suitcase.
My suitcase was missing.
谚语：
An occasion lost cannot be redeemed.
时机失了无法挽回。
3. I forget to take the luggage.
我忘记拿行李了。
还能这样说：
I don't remember to take the luggage.
I fail to bring the luggage.
应用解析：
take one's courage in both hands 勇往直前，敢做敢为；
take by surprise （某人）意料之外
4. Who should I report it to?
我该告诉谁呢？
还能这样说：
Who can I inform this to?
Who can be reported?
应用解析：
of good report 名声好的；
through good and evil report 不管名声好坏；不管舆论如何