| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] their | 99 |
|
| 2 | [v-ing] [prep] their [num ord] | 84 |
|
| 3 | be [v-ing] [prep] [num ord] | 21 |
|
| 4 | be [v-ing] their [num ord] | 12 |
|
