| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] be [v-ing] [prep] a | 154 |
|
| 2 | be [v-ing] [prep] a long | 55 |
|
| 3 | [vb base] be [prep] a long | 10 |
|
| 4 | [vb base] be [v-ing] a long | 7 |
|
