[Grammar] Can we omit 'for' before 'a long time'?

[marker]

Can we omit 'for' before 'a long time'?
Let's consider the following examples:

I've been waiting for a long time.
I've been waiting a long time.

I've lived here for a long time.
I've lived here a long time.

I've been here for a long time.
I've been here a long time.

Thanks in advance for your replies

 

[Roman55]

I am not a teacher.

Yes.

 

[marker]

Any teachers/native speakers?

 

[MikeNewYork]

I agree with Roman.

 

[emsr2d2]

I agree with Roman too. It's fine in BrE.

 

[Roman55]

Any teachers/native speakers?

Just below my user name are the words 'Member Info'. It can be quite revealing sometimes. It shows you what the native language of the member is. Why don't you give it a try?

 

[marker]

Just below my user name are the words 'Member Info'. It can be quite revealing sometimes. It shows you what the native language of the member is. Why don't you give it a try?

Thanks for help and don't feel offended From now on I'm going to be more careful and more inquisitive

 

[Rover_KE]

Thanks for your help and don't feel offended​. [STRIKE][/STRIKE] From now on I'm going to be more careful and more inquisitive. [STRIKE][/STRIKE]

Please don't use home-made emoticons to replace standard punctuation.

If you want to insert a smiley, click on the icon.