| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be unable to attend the [noun] | 15 |
|
| 2 | [be] unable to attend the [noun] | 15 |
|
| 3 | [was/were] unable to attend the [noun] | 9 |
|
| 4 | was unable to attend the [noun] | 7 |
|
| 5 | unable to attend the [noun] [prep] | 6 |
|
| 6 | unable to attend the [noun] [prep] | 6 |
|
