| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have [adv] happened | 111 |
|
| 2 | it had [adv] happened | 66 |
|
| 3 | it have never happened | 33 |
|
| 4 | it 's [adv] happened | 31 |
|
| 5 | it have all happened | 28 |
|
| 6 | it has [adv] happened | 13 |
|
| 7 | it have just happened | 11 |
|
| 8 | it have already happened | 8 |
|
| 9 | it have actually happened | 6 |
|
| 10 | it have really happened | 5 |
|
| 11 | it have ever happened | 5 |
|
