Questions in Perfect Continous Tenses
The table below shows the way we build the questions in Perfect Continous (Progressive) tenses in English.
| Affirmative | Questions | |
|---|---|---|
| Past Perfect Continous | I had been writing an email when you called me.  | 
What had I been writing  when you called me?  | 
| You had been writing an email when she called you.  | 
What had you been writing  when she called you?  | 
|
| He/She/It had been writing an email when I called her.  | 
What has he/she/it been writing  when I called her?  | 
|
| We/You/They had been writing an email when I called them.  | 
What had we/you/they been writing  when I called them?  | 
|
| Present Perfect Continous | I have been writing an email for 20 minutes. | What have I been writing for 20 minutes? | 
| You have been writing an email for 20 minutes. | What have you been writing for 20 minutes? | |
| He/She/It has been writing an email for 20 minutes. | What has he/she/it been writing for 20 minutes? | |
| We/You/They have been writing an email for 20 minutes. | What have we/you/they been writing for 20 minutes? | |
| Future Perfect Continous | I'll have been writing an email  for 20 minutes by 5 p.m. tomorrow.  | 
What will I have been writing  for 20 minutes by 5 p.m. tomorrow?  | 
| You'll have been writing an email  for 20 minutes by 5 p.m. tomorrow.  | 
What will you have been writing  for 20 minutes by 5 p.m. tomorrow?  | 
|
| He/She/It will have been writing an email  for 20 minutes by 5 p.m. tomorrow.  | 
What will he/she/it have been writing  for 20 minutes by 5 p.m. tomorrow?  | 
|
| We/You/They will have been writing an email  for 20 minutes by 5 p.m. tomorrow.  | 
What will we/you/they have been writing  for 20 minutes by 5 p.m. tomorrow?  |