| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] had a [noun] | 59 |
|
| 2 | must have had a [noun] | 59 |
|
| 3 | must [vb infin] had a [noun sg] | 58 |
|
| 4 | must [vb infin] had a [noun] | 50 |
|
| 5 | must [vb infin] had an [noun] | 9 |
|
| 6 | must [vb infin] had a reason | 6 |
|
| 7 | must [vb infin] had a reason | 6 |
|
