1. CEMT I TASK will show you active tasks and their associated transactions. It will not show any transactions where, for example, a screen has been displayed and the system is waiting for user input to proceed -- such a transaction is not considered "active".
2. What do you mean by "syntax of cics"? If you mean "syntax of CICS commands", use CECI. If you mean anything else, you will have to explain what you are talking about.