| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [prep] [art] | 51414 |
|
| 2 | then [prep] [art] | 2057 |
|
| 3 | then [vb -s] [art] | 658 |
|
| 4 | then [vb -s] [prep] | 564 |
|
