| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | happen is that the [noun sg] | 33 |
|
| 2 | happens is that the [noun sg] | 13 |
|
| 3 | happened is that the [noun sg] | 10 |
|
| 4 | happen is that the [noun sg] | 5 |
|
