The English language is a glorious thing, allowing us to express ourselves with passion or dispassion, with brevity or at great length. It can also be a minefield full of potential grammatical errors or confusion.
For example, when do you use 'that' in a sentence, and when do you use 'which'? Both words are pronouns used to introduce clauses in a sentence.
Let's have a look at when only 'that' will do:
He picked the toy that was broken.
Dogs that bark are too noisy.
'That' introduces a 'restrictive relative clause'. Before your eyes start glazing over, this means that without this clause the sentence doesn't make sense. Think about it. "He picked the toy." Which toy? Read More