present
|
past
|
future
|
conditional
|
|
---|---|---|---|---|
s1 |
contribute
|
contributed
|
will contribute
|
would contribute
|
s2 |
contribute
|
contributed
|
will contribute
|
would contribute
|
s3 |
contributes
|
contributed
|
will contribute
|
would contribute
|
p1 |
contribute
|
contributed
|
will contribute
|
would contribute
|
p2 |
contribute
|
contributed
|
will contribute
|
would contribute
|
p3 |
contribute
|
contributed
|
will contribute
|
would contribute
|
present
|
past
|
future
|
conditional
|
|
---|---|---|---|---|
s1 |
am contributing
|
was contributing
|
will be contributing
|
would be contributing
|
s2 |
are contributing
|
were contributing
|
will be contributing
|
would be contributing
|
s3 |
is contributing
|
was contributing
|
will be contributing
|
would be contributing
|
p1 |
are contributing
|
were contributing
|
will be contributing
|
would be contributing
|
p2 |
are contributing
|
were contributing
|
will be contributing
|
would be contributing
|
p3 |
are contributing
|
were contributing
|
will be contributing
|
would be contributing
|
present
|
past
|
future
|
conditional
|
|
---|---|---|---|---|
s1 |
have contributed
|
had contributed
|
will have contributed
|
would have contributed
|
s2 |
have contributed
|
had contributed
|
will have contributed
|
would have contributed
|
s3 |
has contributed
|
had contributed
|
will have contributed
|
would have contributed
|
p1 |
have contributed
|
had contributed
|
will have contributed
|
would have contributed
|
p2 |
have contributed
|
had contributed
|
will have contributed
|
would have contributed
|
p3 |
have contributed
|
had contributed
|
will have contributed
|
would have contributed
|
affirmative
|
negative
|
|
---|---|---|
s1 |
-
|
-
|
s2 |
contribute
|
don't contribute
|
s3 |
contribute
|
don't contribute
|
p1 |
contribute
|
don't contribute
|
p2 |
contribute
|
don't contribute
|
p3 |
contribute
|
don't contribute
|