Today I was working on an article for one of my clients and I wrote:
I'll be happy to give you a list of mortgage lenders here in (city) who have served my clients well in the past.
And Word objected.
Now, we copywriters always try to avoid that pasive/past tense, but sometimes it's necessary. It's what fits. At the same time, we often break the rules of grammar that we learned back in elementary school - because breaking those rules makes the copy sound conversational.
However, a passive voice or conversational tone was not the problem that Word wanted me to correct. Instead, that automated program wanted me to change the sentence to say "HAS served my clients..."
"Lenders who has served... " I wonder how long I'd be working for that client if I started writing things like that. Hopefully, not long.
The bottom line: Don't rely on spell check and grammar check, because they will often lead you astray.
If you aren't sure about grammar and word usage, enlist help from someone who is. I know it must be very difficult for everyone who is using English as a second language, and you have my admiration for even trying. But the key to success is in knowing what you don't know and getting help from someone who does - not from Word.