1)Did the bus arrive at the village every morning?
2) When did the bus arrived at the village?
3)The bus arrived at the village, or in the city every morning?
4)The bus arrived at the village every morning, isn't it?
5)What arrived at the village every morning?

1) Did the president has just come back from his business trip?
2) When did the president come back from his bussiness trip?
3) The president has just come back from his business trip or from his vacation?
4)The president has just come back from his business trip, didn't he?
5) Who has just come back from his business trip?

1) Had our department done all the work by the January?
2)When had our department done all the work?
3)By January our department had done all the work or we will keep working?
4)By January our department had done all the work, isn't it?
5) Who had done all the work by January?

1) Are they discussing at the meeting now?
2)What are they dicussing at the meeting now?
3)They are discussing at the meeting now, or are they at the cinema?
4)They are discussing at the meeting now, don't they?
5) Who is discussing at the meeting now?

1)Will we have been walking for three hours?
2)What will we have been doing for three hours?
3)We will have been walking for three hours, or four hours?
4) We will have been walking for three hours, won't we?
5)Who will have been walking for three hours?