| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | then [noun] [prep] | 603 |
|
| 2 | then [noun sg] [prep] | 410 |
|
| 3 | [adv] headmaster [prep] | 13 |
|
| 4 | then headmaster [prep] | 7 |
|
