0

What does this mean?

What do this mean?

What does these mean?

What do these mean?

When I should use do or does before this and these?

4

The correct versions with this and these are:

What does this mean?

Here this is singular, so you use does. For instance, if you want to ask about a single question, so you would say:

What does this question mean?

Next:

What do these mean?

Likewise, these indicates plural objects in number. So you use do. Following the previous example, you would ask:

What do these questions mean?

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