"I was so sad everything went wrong."

Is this a run-on sentence?

This sentence has two subjects ( I and everything) and two verbs (was and went). There are two independent clauses. There is no punctuation between them. At first glance I said it was run-on sentence and the word that should be inserted between sad and everything, but then a student asked me why it was necessary to insert that?

  • The sentence itself looks lacking something. I was so sad as everything went wrong; I was so sad, everything went wrong; I was so sad because everything went wrong. and so on!
    – Maulik V
    Commented Oct 13, 2014 at 7:20
  • 2
    That could be inserted between the two clauses but it is optional and often omitted in informal speech. See for example omitting that in two-word conjunctions.
    – None
    Commented Oct 13, 2014 at 7:33
  • And the two-word conjunctions scenario is just one of the circumstances where that will be omitted in informal speech. I'm glad you asked this question.
    – TimR
    Commented Oct 14, 2014 at 13:34

1 Answer 1


If the clauses actually are independent (so that the sentence is equal in meaning to "I was so sad. Everything went wrong.", with no obvious causal relationship between one and the other - somebody was sad, and also everything went wrong), then yes, it's a run-on sentence.

However, it seems that the clauses are not independent, and there's a causal relationship between them ("I was sad that/because everything went wrong"), and in this case, as @Laure says in the comment, "that" could be ommited.

It isn't always the case that two clauses with different subjects and verbs are independent. Compare "I told him (that) he was being silly".

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