past tense,present tense,past participle
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past tense,present tense,past participle
Is this correct?
1)Past tense
The demand for energy dropped steadily between 1985 and 1990 from 5 units of energy to approximately 2 units.
2)Present tense
The demand for energy dropps steadily between 5 units of energy to approximately 2 units.
3)past participle
The demand for energy has dropped steadily between 1985 and 1990 from 5 units of energy to approximately 2 units.
or
4)The demand for energy has dropped steadily from 5 units of energy to approximately 2 units.
Is this correct?
1)Past tense
The demand for energy dropped steadily between 1985 and 1990 from 5 units of energy to approximately 2 units.
2)Present tense
The demand for energy dropps steadily between 5 units of energy to approximately 2 units.
3)past participle
The demand for energy has dropped steadily between 1985 and 1990 from 5 units of energy to approximately 2 units.
or
4)The demand for energy has dropped steadily from 5 units of energy to approximately 2 units.
![past tense,present tense,past participle](/uploads/image/z/1836710-62-0.jpg?t=past+tense%2Cpresent+tense%2Cpast+participle)
我觉得pp比较合适
past tense,present tense,past participle
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chat .study 的(past tense 与past participle )
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希望学会英语的Tense.(e.g.Simple Past Tense,Present Perfecet Tense……
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The past tense of
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Simple past tense
past perfect tense