| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it become [adj] [verb] | 232 |
|
| 2 | it become [adj] [verb] | 217 |
|
| 3 | it [verb] necessary [verb] | 58 |
|
| 4 | [pron] become necessary [verb] | 41 |
|
| 5 | [pers pn] become necessary [verb] | 41 |
|
| 6 | it become necessary [verb] | 41 |
|
| 7 | it become necessary [verb] | 41 |
|
