Subjunctive Tense Sequence
When a sentence contains both an indicative and a subjunctive verb, the indicative verb is always the main verb, and its tense limits what tense can be used with the subjunctive.
| If the indicative verb is | and the subjunctive action takes place | the subjunctive tense should be |
| pres., fut., fut. perf. | at the same time | present |
| earlier | perfect | |
| imp., perf., pluperf. | at the same time | imperfect |
| earlier | pluperfect |