1. While still a student, she played roles in many plays.
连词 + 名词做时间状语
2. When asked about the secret of his success, Steven Spielberg said… 连词+过去分词做时间状语
3. When drinking to someone's health, you raise your glasses. 连词 + 现在分词做时间状语
4. It's a custom in China to have some tea before the meal is served. It 做形式主语
5. Many people like this film not just because…, but also
because… 并列连词
6. Having good table manners means knowing…