fact
IF present (simple, cont, perf) + Present (simple, cont, perf)
impossible/unlikely present and future
IF Past (simple, cont) + would/could/might + inf
fact
IF present (simple, cont, perf) + Present (simple, cont, perf)
impossible/unlikely present and future
IF Past perfect (simple, cont) + would/could/might + inf
likely future
IF present (simple, cont, perf) + future/imperative/can, must, might, may
fact
IF Past perfect (simple, cont) + would/could/might + have + v3
likely future
IF Past perfect (simple, cont) + would/could/might + have + v3
likely future
IF present (simple, cont, perf) + future/imperative/can, must, might, may
impossible/unlikely present and future
IF Past (simple, cont) + would/could/might + inf