| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [adv prt] [prep] | 817 |
|
| 2 | could [be] [v-ing] [prep] | 167 |
|
| 3 | could [be] [adv prt] [prep] | 130 |
|
| 4 | could [be] [v-ing] [adv prt] | 52 |
|
