English Grammar solution: Structure of All Tense, Structure of the Tense. i would probably break this chart down into different pieces but most kids have trouble when it comes to the different tenses. so this would help a lot in the classroom.
Both WHETHER and IF are used to introduce a yes/no question. Sometimes they can be used interchangeably, but sometimes they are not interchangeable. Have a look at the grammar sheet below to learn more about how to use them. FCE, CAE, CPE. Advanced Grammar.