| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be strong grounds for | 8 |
|
| 2 | are strong grounds for | 8 |
|
| 3 | [am/are] strong grounds for | 8 |
|
| 4 | [be] strong grounds for | 8 |
|
| 5 | [be] strong grounds for | 8 |
|
