Final answer:
The sentence 'Yo uso este cuchillo' is grammatically correct and it translates to 'I use this knife' in English.
Step-by-step explanation:
The sentence 'Yo uso este cuchillo' is grammatically correct.
In this sentence, 'Yo' is the subject pronoun meaning 'I', 'uso' is the first person singular present tense of the verb 'usar' meaning 'to use', and 'este cuchillo' is the object of the sentence meaning 'this knife'.
Therefore, the sentence 'Yo uso este cuchillo' translates to 'I use this knife' in English.
Learn more about Spanish Grammar