Conditional sentences look at possible situations and the most common types of conditional sentences involve the word ‘if’. In this lesson, we explain the four types of conditionals. We use the zero ...

‘If’ usually introduces conditional clauses. The same applies to other conditionals such as unless, should and in case which, however, perform other functions in different contexts. As conditionals, ...

where you would like to go on holiday, and what you could do on the weekend. We use the conditional tense to talk about things that might happen in the future. It's also used to mean 'would', 'could' ...