| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had be [verb] a | 652 |
|
| 2 | had be [v-ing] a | 275 |
|
| 3 | [verb] be using a | 25 |
|
| 4 | have be using a | 25 |
|
| 5 | had be using [art] | 21 |
|
| 6 | had be use a | 10 |
|
| 7 | [vb past] be using a | 9 |
|
| 8 | had [be] using a | 9 |
|
