different forms of when ...in german
1.when can we meet ?
2.when does the film begin ?
3.when will the train come ?
4.when is the last bus to next village ?

meet ...........?
come.............?
begin .............?
last ...........?
first .......?

Question

different forms of when ...in german 
1.when can we meet ?
2.when does the film begin ?
3.when will the train come ?
4.when is the last bus to next village ?

meet ...........?
come.............?
begin .............?
last ...........?
first .......?

Answer

I am not quite sure what different forms of "when" you are referring to. The form is always the same, just your sentences are different...

1. Wann können wir uns treffen?
Better: Wann wollen/sollen wir uns treffen?

2. Wann beginnt der Film?

3. Wann kommt der Zug an?
Better (if it's about a person arriving): Wann kommt Dein Zug an? Wann kommst Du an?

4. Wann fährt der letzte Bus ins Nachbardorf?

meet = sich treffen
come = kommen
begin = beginnen / anfangen
last ...= der/die/das letzte...
at last = zuletzt
first... = der/die/das erste...
first (adverb) = zuerst