Thanks for the help, masaegu san. :)

Hi, masaegu san, what if that person doesn't work on a daily basis (like maybe he works only 2 to 3 days a week). In that case, do you think is possible to ask him if he is working today by saying 今日は働きますか?

Also, do those phrases you mentioned all come with the same meaning which is "Are you working today, Mr. Tanaka?"? If not, do you mind translating it? :p

By the way, masaegu san. Why is "要る" supported by particle "が" and not "を"?

For example: 僕はビザが要る。(I need a visa)

Also, when referring to "I use chopsticks to eat sushi" , am I right to say "すしを食べに箸を使う。"?

No. You should read up on how to use 〜ために. すしを食べるためにはしを使う I suppose.

「要る」 does not directly translate to "to need" in English.

In English, "need" takes a direct object. In Japanese, it does not.

What do I need? I need a visa.
Here the answer to "what" is the direct object.

But you can't say "What do I 「要る」?"
This is because 「要る」 is more accurately translated as "to be needed", so whatever "is needed" would take the particle 「が」.

So here, you do not 「要る」 the visa, but the visa is the one doing the「要る」-ing. Haha, forgive my Japinglish but I hope that clears it up for you!

Yes and no.

Native speakers don't say it; That's for sure.

If you say it, it will be understand but you will sound very foreign.

Same meaning. I never said "Mr. Tanaka", though.

The only reason is that it's an intransitive verb. I thought I had already spent quite some time explaining specifically to you the difference between transitive and intransitive....

A person cannot いる anything. Something may いる.

(Better writers would seldom use that kanji 要 to write the word.)

Likewise, a person cannot 降る anything. Things (rain, snow, etc.) can 降る.

You cannot 集まる anything. Things (stamps, CD's, paintings, etc.) can 集まる.
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You said "For example: 僕はビザが要る。(I need a visa)"

"I need a visa" is only a translation. The "literal" translation would be "As for me, a visa is necessary."

Thanks for the help, guys. Didn't know that "いります" is a intransitive verb untill now. :)

Hi masaegu san, am I right that sentences number 6 and 7 can also mean "Are you working or not today?" and "Do you have to work today?"?

#6 means "Are you going to the office today or not?"

#7 means "You work today, don't you?"