Grammar Challenge

already started had already started has already started was already started

are speaking is speaking were speaking speak

paid had paid have paid would pay

was were am would be

must sign must be signed must have signed is signed

listened was listening had listened has listened

do did have done are doing

Not knowing Not known Not to know Not having known

lived has lived had lived was living

would take would have taken will take took

consider to consider considering consideration

is was be were

Praising Praised Being praised Having praised

is are has have

must be signed must sign must have signed must been signed

would come would have come will come came

he arrived did he arrive he did arrive arrived he

is believed believes is believing believed

submits submitted submit has submitted

telling to tell tell having told