Grammar Challenge

do did have done are doing

are speaking is speaking were speaking speak

he arrived did he arrive he did arrive arrived he

is was be were

is are has have

Not knowing Not known Not to know Not having known

was were am would be

already started had already started has already started was already started

is believed believes is believing believed

must be signed must sign must have signed must been signed

consider to consider considering consideration

must sign must be signed must have signed is signed

would come would have come will come came

would take would have taken will take took

submits submitted submit has submitted

listened was listening had listened has listened

telling to tell tell having told

lived has lived had lived was living

paid had paid have paid would pay

Praising Praised Being praised Having praised