你可能感兴趣的试题
am watching TV was watching TV have watched TV watched TV
a ,the the, an a,an an,an
UFO’s are only recent observations UFO sightings are not new UFO’s are just comets, and auroras etc. UFO’s are inventions by people who lack scientific knowledge
what did you see what you saw when did you see it when you saw
UFO’s are only recent observations UFO sightings are not new UFO’s are just comets, and auroras etc. UFO’s are inventions by people who lack scientific knowledge
had walked was walking has walked is walking
An, the A, the A, a An, a
what did you see what you saw when did you see it when you saw
While After Before Because