This is one sheet (out of a set of 4) that lays out which kinds of trigger phrases/expressions warrant the subjunctive and which warrant the indicative. This sheet is expressions of certainty vs doubt. There are two versions of the sheet. One filled in version (for your reference or if you wish to give your students one filled out) and one empty version (where they must fill in definitions and examples).
Click here for the download of all four sheets: