| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be [v-ing] [pron] [art] | 20 |
|
| 2 | to be [verb] [pron] a | 16 |
|
| 3 | [prep] be [v-ing] [pron] a | 15 |
|
| 4 | to [be] [v-ing] [pron] a | 13 |
|
