| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] be unable | 148 |
|
| 2 | [vb base] [been] unable | 146 |
|
| 3 | [vb base] been unable | 146 |
|
| 4 | have [be] unable | 131 |
|
| 5 | 've [be] unable | 15 |
|
