They were eating doughnuts in the park.

Who were eating doughnuts in the park?
What were they doing in the park?
What were they eating in the park?
Where were they eating doughnuts?
Were they eating doughnuts in the park?

I have been waiting for you for so long.

Who waited for you so long?
What had he been doing for so long?
How long has he been waiting for you?
Where was he waiting for you?
He is been waiting for you this long? ← ???

They sat quietly and watched the stars.

Who sat quietly and watched the stars?
What did they do?
How did they sit?
What did they do before starting to watch the stars?
What did they watch?

She said to him, “Go home”.

Who said to him, “Go home”?
What had she told him?
How had she told him?
Where had she told him to “Go home”?
Did she tell him to go home or outside?

He sat and happily played in game.

Who sat and happily played the game?
What did he do before starting to play the game?
What did he do after he sat?
How did he play the game?
What did he play?

I will go alone to Moscow or Novgorod for the weekend.

Who will go alone to Moscow or Novgorod for the weekend?
What do I will alone this weekend?
What will I do alone this weekend?
How can I go alone to Moscow or Novgorod for the weekend?
Where am I going alone this weekend?
Will I go alone to Moscow or Novgorod for the weekend?

He quickly ran with the dog around the apartment complex.

Who quickly ran with the dog around the apartment complex?
How did he run with the dog around the apartment complex?
What pet did he quickly run with around the apartment complex?
What way did he quickly run with the dog?
What did he quickly run with the dog around?

I have my hair cut every month at the barbershop around the corner.

Who haircut every month at the barbershop around the corner?
Who has he hair cut every month at the barbershop around the corner. What do I do every month at the barbershop around the corner?
How do I get my haircut every month at the barbershop around the corner?
Where … I get my hair cut every month around the corner?
Where do I get my hair cut every month around the corner?
Do I get my hair cut every month at the barbershop around the corner or not?

She walked happily on the alley.

Who walked happily on the alley?
What did she do happily on the alley?
How did she walk on the alley?
Where did she walk happily?
Did she walk happily on the alley?

The window was broken by a stone yesterday.

What the window was broken by a stone yesterday?
Was the window broken by a stone yesterday?
By what was the window broken yesterday?
When was the window broken by a stone?
What broke the window?

Thanks.