question: in the case that your nef file doesn't open, it is highly likely that you do not have the correct software application installed on your pc to view or edit nef file extensions.
Capitalize this past sentence correctly.
A: In the case that your NEF file doesn't open, it is highly likely that you do not have the correct software application installed on your PC to view or edit NEF file extensions.

question: simun knows the names of the different places and tells us how many gannets one normally could catch on the different shelfs.
Capitalize this past sentence correctly.
A: Simun knows the names of the different places and tells us how many gannets one normally could catch on the different shelfs.

question: putin's act after the accident was unforgettable.
Capitalize this past sentence correctly.
A: Putin's act after the accident was unforgettable.