How to solve this problem?
Can we make its Passive form?
I changed it like this,
How is this problem to be solved?
Correct me, please.
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Can we make its Passive form?
I changed it like this,
How is this problem to be solved?
Correct me, please.
I'd go with
How is this problem solved?
No "to be".
To be passive only requires "problem" to be the object of the verb ("solved"). It's over complicating it to also make the verb an infinitive ("to be").