| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] back [prep] school | 7 |
|
| 2 | [vb mod] [vb infin] back [prep] school | 7 |
|
| 3 | [adv] [vb infin] back [prep] school | 6 |
|
| 4 | not [vb infin] back [prep] school | 5 |
|
| 5 | [not/n't] [vb infin] back [prep] school | 5 |
|
| 6 | [vb infin] [verb] back [prep] school | 8 |
|
| 7 | [vb infin] [to-vb] back [prep] school | 7 |
|
| 8 | [vb infin] go back [prep] school | 6 |
|
| 9 | [vb infin] to go back [prep] school | 5 |
|
