|
Probability
|
Type
|
Formula
|
Example
|
| Certain |
Zero
|
if + subj .+ present, subj .+ present
|
If people don't eat, they get hungry |
| Likely |
First
|
if + subj .+ present, subj .+ future
|
If you cook the supper, I'll wash the dishes |
| Unlikely |
Second
|
if + subj .+ s.past + subj + conditional
|
If I knew the answer, I would tell you |
| Impossible |
Third
|
if + subj .+ past perfect + subj +
past conditional
|
If I had seen him, I would have given him the message |