| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but be [v-ing] | 284 |
|
| 2 | [vb pp] be [v-ing] | 210 |
|
| 3 | [vb pp] but be | 176 |
|
| 4 | [vb pp] but [v-ing] | 30 |
|
