They were in his pocket。它们在他的口袋里。改成一般疑问句的话，就要将谓语动词提前，然后加上“”即可。所以是：Were they in his pocket?它们在他的口袋吗

肯定回Yes，they were.是的，它们在否定回No，they weren't.不，它们不在。They were beautiful.改为一般疑问句是直接把be动词提到句子开头。Were they beautiful