Are both usages of ‘How’ acceptable in this context?
Social media are convenient communication tools, but unless we are careful about how to use them/how we use them, they can do us more harm than good.
Social media are convenient communication tools, but unless we are careful about how to use them/how we use them , they can do us more harm than good . Yes, they are both possible, though the infinitival is much less likely. The grammar and the meanings are slightly different.
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Social media are convenient communication tools, but unless we are careful about how to use them/how we use them, they can do us more harm than good.
Yes, they are both possible, though the infinitival is much less likely. The grammar and the meanings are slightly different.
Syntactically, they are both subordinate interrogatives (embedded questions). But "how to use
The usual and by far the most likely wording is "how we use them". I have to think hard to imagine what it could mean to be careful about how to use them.