| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it become [adj] | 141 |
|
| 2 | when it become [adj] | 140 |
|
| 3 | [conj] it become necessary | 25 |
|
| 4 | [subord] it become necessary | 18 |
|
| 5 | when [pers pn] become necessary | 9 |
|
| 6 | when [pron] become necessary | 9 |
|
| 7 | when it become necessary | 8 |
|
| 8 | when it become necessary | 8 |
|
| 9 | when it become necessary | 8 |
|
| 10 | when it [verb] necessary | 8 |
|
