| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it had become [adj] | 109 |
|
| 2 | it had become clear | 23 |
|
| 3 | it had become clear | 23 |
|
| 4 | it had become apparent | 9 |
|
| 5 | it had become apparent | 9 |
|
| 6 | it had become necessary | 6 |
|
| 7 | it had become obvious | 6 |
|
| 8 | it had become evident | 6 |
|
| 9 | it had become obvious | 6 |
|
| 10 | it had become necessary | 6 |
|
| 11 | it had become evident | 6 |
|
| 12 | it had become [num] | 5 |
|
