| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] been [verb] [prep] [adj] | 1621 |
|
| 2 | [adv] been [vb pp] [prep] [adj] | 1529 |
|
| 3 | [adv] be introduced [prep] [adj] | 35 |
|
| 4 | [adv] [be] introduced [prep] [adj] | 35 |
|
| 5 | [adv] [been] introduced [prep] [adj] | 17 |
|
| 6 | [adv] been introduce [prep] [adj] | 17 |
|
