| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [v-ing] | 6932 |
|
| 2 | [vb past] [v-ing] [adv prt] | 1818 |
|
| 3 | been [v-ing] [adv prt] | 1534 |
|
| 4 | [vb past] been [adv prt] | 634 |
|
