| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not been [prep] | 983 |
|
| 2 | not been [prep] | 983 |
|
| 3 | not be at | 176 |
|
| 4 | not [be] at | 176 |
|
| 5 | [adv] been at | 150 |
|
| 6 | not [been] at | 50 |
|
| 7 | not been at | 50 |
|
