| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 79523 |
|
| 2 | [vb -s] be [v-ing] | 4818 |
|
| 3 | [vb -s] be [prep] | 2881 |
|
| 4 | [vb -s] [v-ing] [prep] | 1368 |
|
