Only use capital letters for special emphasis.

只有在特别强调的时候才用大写字母。

youdao

At least I understand how to use CAPITAL LETTERS!

至少我懂得怎样用首字母！

youdao

Find five sentences and then write them out. Use capital letters where necessary.

找出五个句子，然后把它写下来，必要时用大写字母。

youdao

Markers also found candidates used commas and capital letters randomly and were uncertain about the correct use of tenses, apostrophes and paragraphs.

BBC: Scottish exam markers find errors in basic English

And second, there is the widespread view that since capital letters are used solely to distinguish proper nouns - names or titles - it is not appropriate to use one for the network that links our computers together or the publishing system that runs on top of it.

BBC: Computer user