to offer
offerred, offerring
offered, offering
to transfer
transferred, transferring
transfered, transfering
to refer
referred, referring
refered, refering
to infer
infered, infering
inferred, inferring
to suffer
sufferred, sufferring
suffered, suffering
to buffer
buffered, buffering
bufferred, bufferring
to differ
differred, differring
differed, differing
to prefer
preferred, preferring
prefered, prefering
to defer
defered, defering
deferred, deferring
to confer
conferred, conferring
confered, confering
