I have seen in some books authors write sale was increased, while others write sale increased. What is the difference between the two, and please explain why?
For example,
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Sale increased in the UK from 2000 to 2005.
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In 2005, the sale was increased in the UK.
Best Answer
if you look at increase in the Cambridge dictionary, you will see [I or t] at the beginning of the entry: this means that increase can be intransitive (subject - verb) or transitive (subject - verb - object). The thing that increases is the subject when the verb is used intransitively and the object when it is used transitively. Look what happens to rail fares in these two active mood sentences:
We can also make a passive mood version. In a passive mood sentence, the patient (what would be the object in an active mood sentence) moves to the front of the sentence, and the agent (the subject of an active mood sentence) can be omitted, or can be attached using a by preposition.
Because the object moves to the front in a passive mood sentence, we can't make a passive mood sentence with an intransitive verb - there is no object. So, we make it with the transitive form:
Looking at your sentences, the first is in active mood, using increase as an intransitive verb with sales as the subject.
The second sentence is in passive mood: the agent is omitted, so we don't know who or what is causing the increase to happen, and sales is the patient.
Notes
1) When sale is used to describe the number of items sold, it is always plural. It is treated a collective noun, so it is used with a singular verb. See the Cambridge Dictionary for confirmation of this.
2) In many contexts, it is OK to use from... to... for a range of dates, but in the above sentence (after increase) it is misleading, and could be taken to mean that 2000 units were sold last time, and 2005 units were sold this time. If you want to be completely clear that 2000 is the starting year and 2005 is the ending year, it would be better to say "between 2000 and 2005"
3) It is not necessary to put the before sales in the second sentence.
The corrected sentences are therefore: