Regular verb: refer - referred - referred
Simple form | V-ing form |
I could refer you could refer she could refer we could refer you could refer they could refer | I could be referring you could be referring she could be referring we could be referring you could be referring they could be referring |
Perfect | V-ing perfect |
I could have referred you could have referred she could have referred we could have referred you could have referred they could have referred | I could have been referring you could have been referring she could have been referring we could have been referring you could have been referring they could have been referring |
Simple form | V-ing form |
I couldn't refer you couldn't refer she couldn't refer we couldn't refer you couldn't refer they couldn't refer | I couldn't be referring you couldn't be referring she couldn't be referring we couldn't be referring you couldn't be referring they couldn't be referring |
Perfect | V-ing perfect |
I couldn't have referred you couldn't have referred she couldn't have referred we couldn't have referred you couldn't have referred they couldn't have referred | I couldn't have been referring you couldn't have been referring she couldn't have been referring we couldn't have been referring you couldn't have been referring they couldn't have been referring |
Simple form | V-ing form |
could I refer? could you refer? could she refer? could we refer? could you refer? could they refer? | could I be referring? could you be referring? could she be referring? could we be referring? could you be referring? could they be referring? |
Perfect | V-ing perfect |
could I have referred? could you have referred? could she have referred? could we have referred? could you have referred? could they have referred? | could I have been referring? could you have been referring? could she have been referring? could we have been referring? could you have been referring? could they have been referring? |
Simple form | V-ing form |
couldn't I refer? couldn't you refer? couldn't she refer? couldn't we refer? couldn't you refer? couldn't they refer? | couldn't I be referring? couldn't you be referring? couldn't she be referring? couldn't we be referring? couldn't you be referring? couldn't they be referring? |
Perfect | V-ing perfect |
couldn't I have referred? couldn't you have referred? couldn't she have referred? couldn't we have referred? couldn't you have referred? couldn't they have referred? | couldn't I have been referring? couldn't you have been referring? couldn't she have been referring? couldn't we have been referring? couldn't you have been referring? couldn't they have been referring? |