Put the words in the correct place in each sentence.例：Astronauts have been to the the moon(already)Astronauts have already been to the the moon.1.They haven't been to Mars.(yet)2.Many asteonauts have visited the space station.(already)3.The spacecraft has reached Mars.(just)
问题描述：
Put the words in the correct place in each sentence.
例：Astronauts have been to the the moon(already)
Astronauts have already been to the the moon.
1.They haven't been to Mars.(yet)
2.Many asteonauts have visited the space station.(already)
3.The spacecraft has reached Mars.(just)
答
They haven't been to Mars yet.
Many asteonauts have visited the space station.
The spacecraft has just reached Mars.
already和just要放在实义动词动词前，助动词后，
yet用于否定句和疑问句，要放在句末
答
1.They haven't been to Mars.(yet)They haven't been to Mars yet.2.Many asteonauts have visited the space station.(already)Many asteonauts have already visited the space station.3.The spacecraft has rea...