Question

请教各位老师几个英语问题 谢谢

1 By the end of this year he_____(teach) gor thirty years.
2 By this time next year, we_____(do ) business with each other for 10 years.
请问这两道题如果填将来完成时算对么 ， 还是必须填将来完成进行时呢。 谢谢

Answer 1

应该是将来完成进行时，表示动作一直发生。比如，过去30年一直教书，或者过去十年一直有生意往来。
将来完成时，表示到那个时候，动作完成，没有表示过去一直发生的意思。
1 By the end of this year he 【will have been teaching】 for thirty years.
2 By this time next year, we 【will have been doing】 business with each other for 10 years.

Answer 2

这两道题都应该用将来完成时态。
will have taught
will have done

Answer 3

将来完成时，因为是有表示将来的时间状语：by the end of the year,和by this time.所以答案是：will have taught与will have done.