Simple present |
don't concentrate |
don't concentrate |
doesn't concentrate |
don't concentrate |
don't concentrate |
don't concentrate |
Present continuous |
am not concentrating |
are not concentrating |
is not concentrating |
are not concentrating |
are not concentrating |
are not concentrating |
Simple past |
didn't concentrate |
didn't concentrate |
didn't concentrate |
didn't concentrate |
didn't concentrate |
didn't concentrate |
Past continuous |
was not concentrating |
were not concentrating |
was not concentrating |
were not concentrating |
were not concentrating |
were not concentrating |
Simple future |
won't concentrate |
won't concentrate |
won't concentrate |
won't concentrate |
won't concentrate |
won't concentrate |
Future continuous |
will not be concentrating |
will not be concentrating |
will not be concentrating |
will not be concentrating |
will not be concentrating |
will not be concentrating |
Present perfect |
have not concentrated |
have not concentrated |
has not concentrated |
have not concentrated |
have not concentrated |
have not concentrated |
Present perfect continuous |
have not been concentrating |
have not been concentrating |
has not been concentrating |
have not been concentrating |
have not been concentrating |
have not been concentrating |
Present continuous |
am not concentrating |
are not concentrating |
is not concentrating |
are not concentrating |
are not concentrating |
are not concentrating |
Past perfect |
had not concentrated |
had not concentrated |
had not concentrated |
had not concentrated |
had not concentrated |
had not concentrated |
Past perfect continuous |
had not been concentrating |
had not been concentrating |
had not been concentrating |
had not been concentrating |
had not been concentrating |
had not been concentrating |
Future perfect |
will have not concentrated |
will have not concentrated |
will have not concentrated |
will have not concentrated |
will have not concentrated |
will have not concentrated |
Future perfect continuous |
will have not been concentrating |
will have not been concentrating |
will have not been concentrating |
will have not been concentrating |
will have not been concentrating |
will have not been concentrating |