restrictive/nonrestrictive relative clauses and comma

[atabitaraf]

It is what I found on Microsoft Word Help about the use of comma in relative clauses:

If these words (explanation) are not essential to the meaning of your sentence, use a comma and which.
Instead of: I have a great book which you can buy for your vacation.
Consider: I have a great book, which you can buy for your vacation.
Or: I have a great book that you can buy for your vacation.

I wondered how 'that' and 'which' could differ in the use of relative clauses. Do you confirm the claiming?

 

[jutfrank]

I suggest you take your grammar guidance from a source other than Microsoft Word Help, especially since you're a teacher.

• Use that in defining relative clauses.
• Use which in non-defining relative clauses.

Do you know what these two kinds of relative clause are?

 

[atabitaraf]

I suggest you take your grammar guidance from a source other than Microsoft Word Help, especially since you're a teacher.

• Use that in defining relative clauses.
• Use which in non-defining relative clause

Do you know what these two kinds of relative clause are?

Thank you. Yes, I do. And how about the use of comma? I have learnt and teach that as long as it is restrictive/defining we do not need and we mustn't use comma. Otherwise we need a comma. I hope I do it right.

 

[jutfrank]

Right.

 

[emsr2d2]

Thank you. Yes, I do. And how What about the use of a/the comma? I have learnt and teach that as long as it is restrictive/defining we do not need and we mustn't use a comma. Otherwise, we need a comma. I hope I do I'm doing it right.