Passive Voice - rob

miyabiIs "rob" should always be used in passive voice?

No, definitely not.

"How will I get the money?" "Rob a bank!"
"I robbed some guy yesterday."
"I was robbing a bank when my phone rang."

All active.

1. I was robbed last night on my way back home.

OK.

2. I was robbed the wallet and mobile phon

Not essentially.

"Rob" is a transitive verb, and can also be used in active form. But, as a rule, "rob" should follow the preposition "of". So the right forms of the sentences 2 and 3 are :- "I was robbed of the wallet and mobile phone last night." "I was robbed of 600 dollars last night."

The active forms of the sentences stand :- 2. "The thieif robbed me of the wallet and mobi

Sorry I was unclear. Yes, you can say "I was robbed of ***" as well as "*** was robbed of me"; it's just a matter of emphasis.

Note that the article in "I was robbed of the wallet" sounds awkward -- it implies there was some kind of specific wallet that was stolen, not even necessarily belonging to you. "I was robbed of my wallet" sounds much better.

ferdisI was robbed of ***" as well as "*** was robbed of me

In AmE, the latter "emphasis" is not commonly used. If my wallet was robbed (of me), it would sound (to me anyway) that my wallet was the target of the robbery. It just doesn't have the right ring to it.

When I think of "rob" I think of someone breaking into my house and stealing from me there. If I was stopped at gunpoint (or knifepoint, etc.) and the person took my wallet and watch (note: "my" not "the"), I was mugged.

You walk into your home and see the TV is missing and say "I was robbed!" In your situation, I would say "I was mugged last night. The thief took my wallet and watch

However, http://www.google.co.in/#hl=en&q=%22robbed+of%22+site:news.bbc.co.uk&start=20&sa=N&fp=12b81a5d82c30213 comes up with over a thousand hits on the phrase "robbed of". Some examples out of many:

"The victim was stopped by two men wearin