Regular verb: preascertain - preascertained - preascertained
Simple form | V-ing form |
I could preascertain you could preascertain he could preascertain we could preascertain you could preascertain they could preascertain | I could be preascertaining you could be preascertaining he could be preascertaining we could be preascertaining you could be preascertaining they could be preascertaining |
Perfect | V-ing perfect |
I could have preascertained you could have preascertained he could have preascertained we could have preascertained you could have preascertained they could have preascertained | I could have been preascertaining you could have been preascertaining he could have been preascertaining we could have been preascertaining you could have been preascertaining they could have been preascertaining |
Simple form | V-ing form |
I couldn't preascertain you couldn't preascertain he couldn't preascertain we couldn't preascertain you couldn't preascertain they couldn't preascertain | I couldn't be preascertaining you couldn't be preascertaining he couldn't be preascertaining we couldn't be preascertaining you couldn't be preascertaining they couldn't be preascertaining |
Perfect | V-ing perfect |
I couldn't have preascertained you couldn't have preascertained he couldn't have preascertained we couldn't have preascertained you couldn't have preascertained they couldn't have preascertained | I couldn't have been preascertaining you couldn't have been preascertaining he couldn't have been preascertaining we couldn't have been preascertaining you couldn't have been preascertaining they couldn't have been preascertaining |
Simple form | V-ing form |
could I preascertain? could you preascertain? could he preascertain? could we preascertain? could you preascertain? could they preascertain? | could I be preascertaining? could you be preascertaining? could he be preascertaining? could we be preascertaining? could you be preascertaining? could they be preascertaining? |
Perfect | V-ing perfect |
could I have preascertained? could you have preascertained? could he have preascertained? could we have preascertained? could you have preascertained? could they have preascertained? | could I have been preascertaining? could you have been preascertaining? could he have been preascertaining? could we have been preascertaining? could you have been preascertaining? could they have been preascertaining? |
Simple form | V-ing form |
couldn't I preascertain? couldn't you preascertain? couldn't he preascertain? couldn't we preascertain? couldn't you preascertain? couldn't they preascertain? | couldn't I be preascertaining? couldn't you be preascertaining? couldn't he be preascertaining? couldn't we be preascertaining? couldn't you be preascertaining? couldn't they be preascertaining? |
Perfect | V-ing perfect |
couldn't I have preascertained? couldn't you have preascertained? couldn't he have preascertained? couldn't we have preascertained? couldn't you have preascertained? couldn't they have preascertained? | couldn't I have been preascertaining? couldn't you have been preascertaining? couldn't he have been preascertaining? couldn't we have been preascertaining? couldn't you have been preascertaining? couldn't they have been preascertaining? |