[Grammar] Reduced sentence

[khanhhung2512]

Hi everybody.
Most couples, however fossilized their relationship, have some interests in common.
I'd like to ask if the sentence above is grammatically correct. If so, what is the full form of that sentence?
Thanks in advance.

 

[bhaisahab]

Hi everybody.
Most couples, however fossilized their relationship, have some interests in common.
I'd like to ask if the sentence above is grammatically correct. If so, what is the full form of that sentence?
Thanks in advance.

Yes, it's fine. It's OK as it is, you could add "is" or "has become" after "relationship".