[Grammar] I haven't heard from you so long

[marker]

Which sentence is correct?

I havent' heard from you so long.

I haven't heard from you for so long.

Is 'for' necessary? Is 'for' it necessary in similar sentences with the verb 'write'?

Thank you for replies .

 

[bhaisahab]

Which sentence is correct?

I havent' heard from you so long.

I haven't heard from you for so long.

Is 'for' necessary?

Thank you for replies .

Yes, "for" is necessary.

 

[emsr2d2]

In BrE, we also say "I haven't heard from you in​ so long".

 

[MikeNewYork]

In AmE, we say both.