present
|
past
|
future
|
conditional
|
|
---|---|---|---|---|
s1 |
stiffen
|
stiffened
|
will stiffen
|
would stiffen
|
s2 |
stiffen
|
stiffened
|
will stiffen
|
would stiffen
|
s3 |
stiffens
|
stiffened
|
will stiffen
|
would stiffen
|
p1 |
stiffen
|
stiffened
|
will stiffen
|
would stiffen
|
p2 |
stiffen
|
stiffened
|
will stiffen
|
would stiffen
|
p3 |
stiffen
|
stiffened
|
will stiffen
|
would stiffen
|
present
|
past
|
future
|
conditional
|
|
---|---|---|---|---|
s1 |
am stiffening
|
was stiffening
|
will be stiffening
|
would be stiffening
|
s2 |
are stiffening
|
were stiffening
|
will be stiffening
|
would be stiffening
|
s3 |
is stiffening
|
was stiffening
|
will be stiffening
|
would be stiffening
|
p1 |
are stiffening
|
were stiffening
|
will be stiffening
|
would be stiffening
|
p2 |
are stiffening
|
were stiffening
|
will be stiffening
|
would be stiffening
|
p3 |
are stiffening
|
were stiffening
|
will be stiffening
|
would be stiffening
|
present
|
past
|
future
|
conditional
|
|
---|---|---|---|---|
s1 |
have stiffened
|
had stiffened
|
will have stiffened
|
would have stiffened
|
s2 |
have stiffened
|
had stiffened
|
will have stiffened
|
would have stiffened
|
s3 |
has stiffened
|
had stiffened
|
will have stiffened
|
would have stiffened
|
p1 |
have stiffened
|
had stiffened
|
will have stiffened
|
would have stiffened
|
p2 |
have stiffened
|
had stiffened
|
will have stiffened
|
would have stiffened
|
p3 |
have stiffened
|
had stiffened
|
will have stiffened
|
would have stiffened
|
affirmative
|
negative
|
|
---|---|---|
s1 |
-
|
-
|
s2 |
stiffen
|
don't stiffen
|
s3 |
stiffen
|
don't stiffen
|
p1 |
stiffen
|
don't stiffen
|
p2 |
stiffen
|
don't stiffen
|
p3 |
stiffen
|
don't stiffen
|