Present Continuous або Present Perfect Continuous

 I am writing a letter.

  I have been writing a letter.

 I am writeing a letter.

   We are staying at this hotel since we arrived.

   We have been staying at this hotel since we arrived.

   She is haveing a shower for an hour.

She has been having a shower for an hour.

   We are staying with our friends.

   We have been staying with our friends.

  He isn't doing any exercise for three weeks.

  He hasn't been doing any exercise for three weeks.

   It is raining all day long.

It has been raining all day long.

 I am not waiting for anybody, I'm just standing .

   I have not waiting for anybody, I'm just standing .

 I am not waiting for anybody, I have just been standing .

  I am waiting for you over an hour.

  I have been waiting for you over an hour.

  I have been trying to contact him since yesterday.

 I am trying to contact him since yesterday.

 I have been tring to contact him since yesterday.

  How long are you working on this project?

 How long have been you working on this project?

 How long have you been working on this project?

  I am just trying to help you!

  I have just trying to help you!

  I am just try to help you!

   He is working a lot recently, no wonder he has all those headaches.

He has been working a lot recently, no wonder he has all those headaches.

He has worked a lot recently, no wonder he has all those headaches.

is playing

is plaing

has been playing

have been playing

isn't snowing

has been snowing

was snowing

is snowing

are you working

have you been working

has been working