Mathayom 5: Essential Grammar ●
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Modal auxiliaries Can, could, may, might, should, ought to, had better, have to, must Imperative sentences Let’s and why don’t Prefer, like…better, would rather Conjunction And, but, or, so And + too, so, either, neither Because Even though, although Future Be going to, will Time clause and if clause Use of present continuous to tell the future Use of Present Simple to tell the future