| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [verb] | 176074 |
|
| 2 | had [vb pp] | 158240 |
|
| 3 | [verb] happened | 4435 |
|
| 4 | have happened | 4405 |
|
| 5 | had happen | 1817 |
|
| 6 | [vb past] happened | 1789 |
|
