do I double? do you double? does she double? do we double? do you double? do they double?
Present continuous
am I doubling? are you doubling? is she doubling? are we doubling? are you doubling? are they doubling?
Preterite
did I double? did you double? did she double? did we double? did you double? did they double?
Preterite continuous
was I doubling? were you doubling? was she doubling? were we doubling? were you doubling? were they doubling?
Present perfect
have I doubled? have you doubled? has she doubled? have we doubled? have you doubled? have they doubled?
Present perfect continuous
have I been doubling? have you been doubling? has she been doubling? have we been doubling? have you been doubling? have they been doubling?
Pluperfect
had I doubled? had you doubled? had she doubled? had we doubled? had you doubled? had they doubled?
Pluperfect continuous
had I been doubling? had you been doubling? had she been doubling? had we been doubling? had you been doubling? had they been doubling?
Future
will I double? will you double? will she double? will we double? will you double? will they double?
Future continuous
will I be doubling? will you be doubling? will she be doubling? will we be doubling? will you be doubling? will they be doubling?
Future perfect
will I have doubled? will you have doubled? will she have doubled? will we have doubled? will you have doubled? will they have doubled?
Future perfect continuous
will I have been doubling? will you have been doubling? will she have been doubling? will we have been doubling? will you have been doubling? will they have been doubling?
Conditional
Present
would I double? would you double? would she double? would we double? would you double? would they double?
Present continuous
would I be doubling? would you be doubling? would she be doubling? would we be doubling? would you be doubling? would they be doubling?
Past
would I have doubled? would you have doubled? would she have doubled? would we have doubled? would you have doubled? would they have doubled?
Past continuous
would I have been doubling? would you have been doubling? would she have been doubling? would we have been doubling? would you have been doubling? would they have been doubling?