Regular verb: stain - stained - stained
Simple form | V-ing form |
I must stain you must stain she must stain we must stain you must stain they must stain | I must be staining you must be staining she must be staining we must be staining you must be staining they must be staining |
Perfect | V-ing perfect |
I must have stained you must have stained she must have stained we must have stained you must have stained they must have stained | I must have been staining you must have been staining she must have been staining we must have been staining you must have been staining they must have been staining |
Simple form | V-ing form |
I must not stain you must not stain she must not stain we must not stain you must not stain they must not stain | I must not be staining you must not be staining she must not be staining we must not be staining you must not be staining they must not be staining |
Perfect | V-ing perfect |
I must not have stained you must not have stained she must not have stained we must not have stained you must not have stained they must not have stained | I must not have been staining you must not have been staining she must not have been staining we must not have been staining you must not have been staining they must not have been staining |
Simple form | V-ing form |
must I stain? must you stain? must she stain? must we stain? must you stain? must they stain? | must I be staining? must you be staining? must she be staining? must we be staining? must you be staining? must they be staining? |
Perfect | V-ing perfect |
must I have stained? must you have stained? must she have stained? must we have stained? must you have stained? must they have stained? | must I have been staining? must you have been staining? must she have been staining? must we have been staining? must you have been staining? must they have been staining? |
Simple form | V-ing form |
must I not stain? must you not stain? must she not stain? must we not stain? must you not stain? must they not stain? | must I not be staining? must you not be staining? must she not be staining? must we not be staining? must you not be staining? must they not be staining? |
Perfect | V-ing perfect |
must I not have stained? must you not have stained? must she not have stained? must we not have stained? must you not have stained? must they not have stained? | must I not have been staining? must you not have been staining? must she not have been staining? must we not have been staining? must you not have been staining? must they not have been staining? |