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