为什么是has not been decided

为什么是has not been decided when and where has not been decided为什么是用has 而不是 have 为什么是has been dead不是has dead 为什么是It has been paid而不是 It has been paid for? How long has the shop been open为什么是been open 而不是been opened Not been before, has been lost.是什么意思 has gone 和has gone 的区别Jack,I have not seen your brother for a long time.He———— Shanghai on businessA.went toB has gong toC has been in为什么是选择B而不选择C呢?是has been in和has gone to 的区别 now he has ()there for two weeks.填been还是gone?为什么是been 为什么是How long has he been there 而不是How long has he gone there 为什么是Where has she been?而不是Where has she been to?；为什么She has been to Beijing.需要to大哥大姐,两问请都打 The tall tree ______ there for many years but it has been cut down.为什么是was 而不是has been “There has been great changes in computers in the last few year”为什么是 has been不是have had there has been a need for sth 不懂为什么是there has been?真是什么时态呢,. having been separated from other continents.Having been separated from other countinents for millions of years,Australia has many plants and animals not found in any other country in the world.为什么是被动语态,难道澳大利亚还是被谁 It's hot .The temperature___35 degrees A has been raised at B has risen to C has been risen forD has raised 答案为什么是B?raise at Her grandmother has been dead for two years 为什么是Her grandmother has been dead for two years 为什么是用dead形容词,而不是died 不是现在完成时吗? she has not been around this week Where to go tomorrow has not been