Question. When are you ...? いつ
... when I was young. 時
... when I watch tv. 時
The other two are close to the same as 時
It is better to remember two rules not four
Just be aware of special words and Japanese meaning as you use the 時form
If it is a question of when then いつ
If it is not a question of when then 時
I don't know when to turn on the tv.
時
I called to ask when the game will be.
Nanze denwa? Ge-mu no jikan wo kitte tameni
Kono koto ha itsu no onnaji imi mitain desu ne.