| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [prep] [v-ing] [prep] [art] | 140 |
|
| 2 | is [prep] [v-ing] [prep] [art] | 140 |
|
| 3 | be [prep] [v-ing] at [art] | 35 |
|
| 4 | [be] [prep] [v-ing] at [art] | 35 |
|
| 5 | [is] [prep] [v-ing] at [art] | 21 |
|
| 6 | is [prep] [verb] at [art] | 19 |
|
| 7 | is [prep] [v-ing] at [art] | 18 |
|
| 8 | is [prep] [v-ing] at [art] | 18 |
|
