Grammar Challenge

do did have done are doing

paid had paid have paid would pay

he arrived did he arrive he did arrive arrived he

would come would have come will come came

Not knowing Not known Not to know Not having known

Praising Praised Being praised Having praised

listened was listening had listened has listened

submits submitted submit has submitted

are speaking is speaking were speaking speak

must sign must be signed must have signed is signed

consider to consider considering consideration

is was be were

was were am would be

would take would have taken will take took

is believed believes is believing believed

already started had already started has already started was already started

lived has lived had lived was living

is are has have

telling to tell tell having told

must be signed must sign must have signed must been signed