| A | B |
|---|
| Present Contrary to Fact: Translation | if + were doing (now) + would do (now) |
| Present Contrary to Fact: Structure | si +Imperfect Subj. + Imperfect Subj. |
| Past Contrary to Fact: Translation | if + had done + would have done |
| Past Contrary to Fact: Structure | si + PluPerfect Subj. + PluPerfect Subj. |
| Future Contrary to Fact: Translation | If + should do (were to do in the future) + would do (in the future) |
| Future Contrary to Fact: Structure | si + Present Subj. + Present Subj. |
| Present Contrary to Fact: Tense | Imperfect Subj. |
| Past Contrary to Fact: Tense | PluPerfect Subj. |
| Future Contrary to Fact: Tense | Present Subj. |
| Simple Fact Present: Translation | if + DO/DOES this + DO/DOES that |
| Simple Fact Present: Structure | if + Pres. Ind. + Pres. Ind. |
| Simple Fact Present: Tense | Pres. Indicative |
| Simple Fact Past: Translation | if + he DID/WAS DOING that + he DID/WAS DOING that |
| Simple Fact Past: Structure | si + Past. Ind. + Past Ind. |
| Simple Fact Past: Tense | Past. Indicative |
| Simple Fact Future: Translation | if + DO/DOES this (in the future) + WILL DO/WILL HAVE DONE |
| Simple Fact Future: Structure | si + Fut. Ind. + Fut. Ind. |
| Simple Fact Future: Tense | Future Indicative |
