No tengo ninguna duda sobre el informe.

I

Breakdown of No tengo ninguna duda sobre el informe.

• tener: to have
• sobre: about
• el informe: the report

Questions & Answers about No tengo ninguna duda sobre el informe.

Why is yo not included before tengo?

In Spanish, subject pronouns are often omitted because the verb ending already shows who the subject is. Tengo clearly means I have, so yo is not necessary.

You could say Yo no tengo ninguna duda sobre el informe, but adding yo usually gives extra emphasis, contrast, or clarity. In a neutral sentence, leaving it out sounds more natural.

Why is it no tengo and not just tengo ninguna duda?

Spanish normally uses double negatives, unlike standard English.

So:

• No tengo ninguna duda = literally I do not have no doubt, but in correct Spanish this means I have no doubt
• The no goes before the verb
• Ninguna reinforces the negative idea

If you remove no, the sentence becomes ungrammatical in standard Spanish:

• Tengo ninguna duda is not correct

What does ninguna mean here, and why is it feminine?

Ninguna means no, not any, or not a single in this context.

It is feminine singular because it agrees with duda, which is a feminine singular noun:

• ninguna duda
• ningún problema

So the form changes depending on the noun:

• ningún
  • masculine singular noun
• ninguna
  • feminine singular noun