must have use refer in sentence
Refer Verb Forms
| Base form (v1) |
Refer |
| Past form (v2) |
Referred |
Past Participle (v3)
-ed form |
Referred |
Present Participle (v4)
‘ing’ form |
Referring |
Present simple (v5)
s / es/ ies |
Refers |
MUST HAVE use -refer verb forms
POSITIVE STATEMENT:
I must have referred
situation
We must have referred
situation
You must have referred
situation
They must have referred
situation
He must have referred
situation
She must have referred
situation
It must have referred
situation
Name must have referred
situation
QUESTION:
must I have referred
situation
?
must We have referred
situation
?
must You have referred
situation
?
must They have referred
situation
?
must He have referred
situation
?
must She have referred
situation
?
must It have referred
situation
?
must Name have referred
situation
?
