By searching/at a large screen

[Anna232]

I think some of my sentences are not idiomatic. I have underlined the parts I am not sure about. Should I use these versions instead: "Computers are very fast, and using them is much easier than wasting time by seaching for information in books. Working at a large screen is more convenient and it also saves students' money."
I remember one of the teachers advice to try to correct and rephrase sentences yourself first. That's why I wrote them twice.

"Computers are very fast, and using them is much easier than seaching in books and wasting time. I use computets to open PDF files of books. Working on a large screen is more convenient and it also saves students' money. Computers and all inventions are designed to simplify our daily lives and it is important to know how to use them properly."

 

[Skrej]

The second version is less wordy, so I'd call it an improvement.

However, the only problem with the first version was using 'at' (a large screen) instead of 'on'. You also need a comma after 'convenient' in the first version.

Strictly speaking, you don't need the possessive marker on 'students'. It's not wrong, but it's not really necessary to state that it's their own money they're saving.

 

[Anna232]

The second version is less wordy, so I'd call it an improvement.

However, the only problem with the first version was using 'at' (a large screen) instead of 'on'. You also need a comma after 'convenient' in the first version.

Strictly speaking, you don't need the possessive marker on 'students'. It's not wrong, but it's not really necessary to state that it's their own money they're saving.

If the possessive marker isn't necessary can I write that sentence in the following way?
Computers are very fast, and using them is much easier than wasting time by seaching for information in books. Working at a large screen is more convenient and it also saves students money.

Do you mean there should should be a comma after convinient in both versions? The sentences are the same.
I had "book PDF files" instead of "PDF files of books" I changed that. "Book PDF files are wrong, aren't they?

 

[emsr2d2]

If the possessive marker isn't necessary can I write that sentence in the following way?
Computers are very fast, and using them is much easier than wasting time by seaching for information in books. Working at on a large screen is more convenient and it also saves students money.

Skrej already told you that "at" was wrong so you should have corrected it in this version. Other than that, your new version is OK.

Do you mean there should should be a comma after convinient in both versions? The sentences are the same.

I wouldn't put a comma after "convenient" but it's not wrong.

I had "book PDF files" instead of "PDF files of books". I changed that. "Book PDF files" are is wrong, aren't they isn't it?

Yes, "book PDF files" is wrong. I'd say "PDFs of books".

 

[Tarheel]

I would say:

wasting time searching for information in books