then as an adverb

[uktous]

Hi,

Question:
Which sentences are correct?

Setence1:
The price rises to $100 in 2010. Then, the price rises to $200 in 2011.
Setence2:
The price rises to $100 in 2010. The price, then, rises to $200 in 2011.
Setence3:
The price rises to $100 in 2010, then the price rises to $200 in 2011.
Setence4:
The price rises to $100 in 2010, and then rises to $200 in 2011.

Thanks

[Raymott]

Hi,

Question:
Which sentences are correct?

Setence1:
The price rises to $100 in 2010. Then, the price rises to $200 in 2011.
Setence2:
The price rises to $100 in 2010. The price, then, rises to $200 in 2011.
Setence3:
The price rises to $100 in 2010, then the price rises to $200 in 2011.
Setence4:
The price rises to $100 in 2010, and then rises to $200 in 2011.

Thanks

You need to be clear about whether you are using "then" as an adverb of time ('after that', 'at that time'), or what might be called an adverb of consequence. The sentences require an adverb of time.
Sentences 1, 3, 4 use 'then' correctly (albeit that they are not very elegant.)
Sentence 2 uses 'then' as an adverb of consequence. As such, it doesn't make sense. If you removed the commas, it would be an adverb of time, as in the other sentences.

'Then' as an adverb of consequence - nothing to do with time:
"Well, if that's how you feel, then I won't go with you."
"The price rose from $100 to $200. This, then, was a rise of 100%.
"What does this sentence mean, then?"

[uktous]

You need to be clear about whether you are using "then" as an adverb of time ('after that', 'at that time'), or what might be called an adverb of consequence. The sentences require an adverb of time.
Sentences 1, 3, 4 use 'then' correctly (albeit that they are not very elegant.)
Sentence 2 uses 'then' as an adverb of consequence. As such, it doesn't make sense. If you removed the commas, it would be an adverb of time, as in the other sentences.

'Then' as an adverb of consequence - nothing to do with time:
"Well, if that's how you feel, then I won't go with you."
"The price rose from $100 to $200. This, then, was a rise of 100%.
"What does this sentence mean, then?"

hi,

is sentence 3 correct?
there is no conjunction

[Raymott]

hi,

is sentence 3 correct?
there is no conjunction

Strictly, a semicolon should be used there.