Question

it started raining ______ we couldn't play​

Answer 1

Grammar:

It started raining, ______ we couldn't play​.

Answer:

It started raining, so we couldn't play.

Answer 2

It started raining so we couldn't play​.

• The conjunction 'so' is used to complete the given sentence as the conjunction joins the sentence and makes it a meaningful one.
• Conjunctions can be categorized into three types: correlative, subordinating, and coordinating.
• The conjunction 'so' is coordinating and is used here to give the result 'we couldn't play' of 'It started raining'.
• The use of 'so' is the appropriate one here and there is no alternative for that.