| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [Wh adv] [noun] | 832 |
|
| 2 | is [noun] [letter] | 163 |
|
| 3 | [Wh adv] [noun] [letter] | 108 |
|
| 4 | is [Wh adv] [letter] | 28 |
|
