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have; has has; have, have; have has; has
have gone has gone have been has been
have; has has; have, have; have has; has
when since as soon as while
close; has closed close; has been closed closed; has been closed closed; has been close
had taught; president has taught; the president taught; president has been teaching; the president
has been added to has added to has been added up to has added up to
have not been decided are not decided has not been decided has not decided
have set up has set up have been set up has been set up
has taught taught has been taught has been teaching
was writing has written has been writing has been written
has taught was taught had been taught has been taught
leaves; has gone left; has been away leaves; has been away left; has gone
has gone has been has gone to has been to
have has have been has been
has been to; went there has gone to; has been away has been in; left has gone to; has left
was opened has been opened has been open was open
has trained have trained has been trained have been trained
close; has closed close; has been closed closed; has been closed closed; has been close
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