探究发现
①It doesn't make much of a difference whether a teacher speaks British or American English.
②I've already decided to join the theatre group.
③Many factors have influenced American pronunciation since the first settlers arrived four hundred years ago.
④A Londoner has more difficulty understanding a Scotsman from Glasgow than understanding a New Yorker.
⑤Some experts believe that the two varieties are moving closer together.
⑥Since the 1980s, with satellite TV and the Internet, it has been possible to listen to British and American English at the flick of a switch.
⑦This international dimension suggests that in the future, there are going to be many “Englishes”， not just two main varieties.
⑧Users of English will all be able to understand each other — wherever they are.
[我的发现]
(1)①、④句用了一般现在时态。
(2)②、③、⑥句用了现在完成时态，表示该动作发生在过去，持续到了现在。
(3)⑤句用了现在进行时态，表示现阶段正在进行的动作。
(4)⑦、⑧句用了一般将来时态，⑦句表示有征兆、迹象会发生某事，而⑧句表示将要发生的动作或状态。
