1.Tell me how was the exam.

2.Tell me how the exam was.

1.Tell me how can I do it.

2.Tell me how I can do it.

1.Do you see what problems it can bring ?

2.Do you see what problems can it bring?

1.Tell me what other things can I do.

2.Tell me what other things I can do.

1.I know why it must happen.

2.I know why must it happen.

1.I see why he must work more .

2.I see why must he work more .

1.I need to know what must I prepare .

2.I need to know what I must prepare .

a

an

Their

There

Them

They

1.inhappy

2.unhappy.

1.unregular

2.irregular

1.impatient

2.unpatient

1.inable

2.unable

1.I don't know why is it happening.

2.I don't know why it's happening.

1.I need to know what I must prepare.

2.I need to know what must I prepare.

1.Do you know where he lives ?

2.Do you know where does he live?

1.Do you know why was she so angry?

2.Do you know why she was so angry?

1.for

2.about

1.about

2.with