副词

1. 刚刚;才;勉强
You use scarcely to emphasize that something is only just true or only just the case.

2. 几乎不;简直不
You can use scarcely to say that something is not true or is not the case, in a humorous or critical way.

3. 刚…(就…)
If you say scarcely had one thing happened when something else happened, you mean that the first event was followed immediately by the second.