Ustedes necesitarán mucho oxígeno para sobrevivir en el espacio.

Questions & Answers about Ustedes necesitarán mucho oxígeno para sobrevivir en el espacio.

How is the future tense formed in necesitarán?
In the future simple tense, we don't drop the ending of the verb like we do in the present tense. Instead, we add the new ending directly to the full infinitive verb. For ustedes (you all), the ending is -án. So, necesitar (to need) becomes necesitarán (you all will need). Notice the accent mark on the final á, which tells you to stress that syllable!
Why do we use para here instead of por?
We use para when we mean 'in order to' do something. In this sentence, you need oxygen in order to survive. Whenever you want to express 'in order to' followed by an action (like the infinitive sobrevivir), you will almost always use para.
Why is it en el espacio and not just en espacio like in the English translation?
In Spanish, general concepts and unique environments like space, nature, or life usually require a definite article (el, la, los, las). While English just says 'in space,' Spanish requires 'in the space,' making it en el espacio.
Could I use muy instead of mucho before oxígeno?
No, because oxígeno is a noun. We use mucho (a lot of / much) to describe quantities of nouns, and it must match the masculine singular noun oxígeno. You would only use muy (very) before adjectives or adverbs, like saying muy frío (very cold).

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