itsu いつ

Interrogative word meaning: when, what time

1. Used in a question
いつここへ来たんですか。
Itsu koko e kita n desu ka.
When did you come here?
いつできるかたずねましたか。
Itsu dekiru ka tazunemashita ka.
Did you ask when it will be finished?
(reported speech)

2. With specific particle in a question
彼女はいつから病気なのですか。
Kanojo wa itsu kara byoukina no desu ka.
Since when has she been sick?
いつまで日本にいるんですか。
Itsu made nihon ni iru n desu ka.
Until when (how long) are you in Japan?

3. Used in noun clause in a declarative sentence
いつ始まるのか分かりません。
Itsu hajimaru no ka wakarimasen.
I don't know when it begins.

4. Followed by the subject marker が ga
いつがよろしいですか。
Itsu ga yoroshii desu ka.
When will be convenient for you?