我想知道某些情况下的Gherkin语法。假设我有以下事件A，B {1}，B {2}，C，D1，D2，G。
其中大写{number}事件（例如B1，D2）是并行事件（同时发生）。
其中大写事件（如A，G）是正常事件。符号||表示OR，而&&表示AND。
现在，我如何为以下情况编写单元规格。
1. Arrange Event: P Act Event: Q Assert Event: C
2. Arrange Event: P Act Event: B1, B2, B3 Assert Event: C && D
3. Arrange Event: P || X || Y Act Event: B1, B2, B3 Assert Event: C || D
4. Arrange Event: P || X && Y Act Event: B1, B2, C Assert Event: D {C only happens after B1 and B2}
5. Arrange Event: P && X Act Event: B, C||D Assert Event: E {Either C or D have to happen one after another}
6. Arrange Event: P Act Event: B, C&&D Assert Event: E {{Both C and D have to happen one after another}
7. Arrange Event: P Act Event: B1||B2, C1&&C2, E Assert Event: F {Either of the event B1 or B2 happens simultaneously, afterward both C1 and C2 have to happen simulatenously}
8. Arrange Event: P Act Event: B1||B2, C&&D, E Assert Event: F {Either of the event B1 or B2 happens simultaneously, afterward, both C and D have to happen one after another}