| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [noun pl] has been [vb pp] | 155 |
|
| 2 | of [noun pl] has be [vb pp] | 155 |
|
| 3 | of [noun pl] has [been] [vb pp] | 155 |
|
| 4 | of [noun pl] has [be] developed | 7 |
|
