Grammar Challenge

he arrived did he arrive he did arrive arrived he

lived has lived had lived was living

would come would have come will come came

are speaking is speaking were speaking speak

Not knowing Not known Not to know Not having known

do did have done are doing

is was be were

listened was listening had listened has listened

is are has have

is believed believes is believing believed

telling to tell tell having told

Praising Praised Being praised Having praised

was were am would be

already started had already started has already started was already started

consider to consider considering consideration

submits submitted submit has submitted

would take would have taken will take took

paid had paid have paid would pay

must be signed must sign must have signed must been signed

must sign must be signed must have signed is signed