| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 79523 |
|
| 2 | but [v-ing] [prep] | 746 |
|
| 3 | but be [prep] | 286 |
|
| 4 | but be [v-ing] | 284 |
|
