| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] have [been] [adj] for | 140 |
|
| 2 | it [modal v] have [been] [adj] for | 117 |
|
| 3 | [pron] [modal v] have [been] necessary for | 8 |
|
| 4 | it [modal v] have [be] necessary for | 6 |
|
| 5 | it [modal v] have [been] necessary for | 6 |
|
| 6 | it [modal v] have [been] necessary [prep] | 6 |
|
| 7 | it [modal v] have [been] necessary for | 6 |
|
| 8 | it [modal v] have [been] necessary [prep] | 6 |
|
| 9 | [pers pn] [modal v] have [been] necessary for | 6 |
|
| 10 | it [modal v] have [been] necessary for | 6 |
|
| 11 | it [modal v] [verb] [been] necessary for | 6 |
|
