| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] have become | 458 |
|
| 2 | which have become | 318 |
|
| 3 | [Wh det] has become | 203 |
|
| 4 | [Wh det] had become | 155 |
|
| 5 | what have become | 141 |
|
| 6 | [Wh det] have become | 100 |
|
