Is this sentence correct? "Also we have to share ideas with each other that widens our knowledge"

Does this "that" refer to the whole previous statement? Shouldn't we use "this" or "it" after that to refer the verb "widens" to the whole previous statement?

Can we write this sentence in a better form? If we use "which" instead of that it doesn't differ?

  • As far as I can tell (it's not completely clear why you think the sentence could be wrong), it's fine except for the fact that it should be widen (singular)—because that refers to the ideas being shared. – Jason Bassford Supports Monica Jul 29 '18 at 4:59
  • Your intent is unclear. Do you mean to convey that (sharing ideas) widens our knowledge, or that you want to share (ideas which widen our knowledge)? – Davo Jul 29 '18 at 16:01

There is not so much wrong with the English grammar, but the idea is not clearly expressed. The word "that" refers to "ideas" not the whole phrase.

You will need to decide what you are trying to say: Are you saying "ideas widen knowledge"? Or you saying that "some ideas widen knowledge, and we must share those ideas". Neither option seems right.

But what I think you want to say is that "the sharing of ideas widens knowledge". If so, your clause is wrong, since it describes the ideas. You want it to describe the "sharing".

Since "widen knowledge" is the purpose of "sharing ideas", a better way to write your sentence would be:

We have to share ideas with each other to widen our knowledge.

The infinitive gives the purpose of the main clause, it describes the purpose of sharing, instead of describing the ideas. You could also use a participle phrase.

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