Is it grammatically correct to use "on there" in this sentence? Or, is "on there" used correctly in terms of meaning in this context?
Answer from a Native speaker
Yes, it is grammatically correct to use "on there" in this sentence. "On there" is in reference to on top of the pulley system that they are creating. It is common to use "there" or "that" in reference to parts of a sentence that can be omitted.
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