| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 79523 |
|
| 2 | be [prep] be | 15769 |
|
| 3 | [v-ing] [prep] be | 11457 |
|
| 4 | be [v-ing] be | 1891 |
|
