| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [adv] [prep] a | 989 |
|
| 2 | be [v-ing] [adv prt] [prep] a | 534 |
|
| 3 | be [v-ing] back [prep] [art] | 270 |
|
| 4 | be [v-ing] back [prep] [art] | 270 |
|
| 5 | be [verb] back [prep] a | 133 |
|
| 6 | be [v-ing] back [prep] a | 35 |
|
| 7 | be [v-ing] back [prep] a | 29 |
|
| 8 | be [v-ing] back [prep] a | 29 |
|
| 9 | [be] [v-ing] back [prep] a | 29 |
|
