| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] be [v-ing] [prep] [det] | 193 |
|
| 2 | be [v-ing] [prep] [det] time | 108 |
|
| 3 | [vb base] be [prep] [det] time | 9 |
|
