Type | Meaning Of if-clause | if-clause | Result clause |
1 | True in present/future | Simple present S+V1+obj S+tobe+noun | Simple present / simple future |
2 | Untrue in present/future | Simple past S+V2+obj S+tobe+noun | Would +simple form |
3 | Untrue in past | Past perfect S+had+V3 | Would have + past participle |