| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] for a | 1648 |
|
| 2 | be [not/n't] [v-ing] a | 366 |
|
| 3 | be [not/n't] [v-ing] for | 302 |
|
| 4 | [not/n't] [v-ing] for a | 65 |
|
| 5 | be [not/n't] for a | 29 |
|
