Es cierto que ella trabaja mucho.

Questions & Answers about Es cierto que ella trabaja mucho.

Why does this sentence use the normal verb trabaja instead of the subjunctive trabaje?
Even though it looks just like the other 'es + adjective + que' phrases in this lesson, es cierto que states a fact or a certainty ('it is true that'). In Spanish, you use the regular indicative mood (like trabaja) for facts. You only use the subjunctive for subjective opinions, doubts, or recommendations (like es importante que).
Could I say es verdad que instead of es cierto que?
Yes! Es verdad que means the exact same thing and is very common. Both phrases express certainty, so both are followed by the normal indicative verb.
Why doesn't mucho change to mucha to match the feminine ella?
In this sentence, mucho is an adverb describing how much she works (the verb trabaja). Adverbs never change their ending. Mucho only changes to mucha, muchos, or muchas when it acts as an adjective describing a noun, like in mucha agua (a lot of water).
Is it necessary to include the pronoun ella here?
Not always, but it is often helpful. Without it, trabaja mucho could mean 'he works a lot,' 'she works a lot,' or 'you (formal) work a lot.' If you and the listener already know who you are talking about, you can safely drop ella.

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