| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] [prep] [det] [noun] [is] | 6 |
|
| 2 | is [v-ing] [prep] [det] [noun] be | 6 |
|
| 3 | is [v-ing] [prep] [det] [noun] is | 6 |
|
| 4 | is [v-ing] [prep] [det] [noun sg] [be] | 5 |
|
