| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] course it [be] | 549 |
|
| 2 | [prep] it [be] [noun] | 421 |
|
| 3 | [prep] course [be] [noun] | 25 |
|
| 4 | course it [be] [noun] | 24 |
|
