Swedish: An Essential Grammar, 2nd edition

Skriver du inte till mor, blir hon ledsen. 
cf. Skriver du inte till mor? (Yes/no question)
Clauses of this type also occur in English:
Had I known when you were arriving, I would have waited.
Hade jag vetat när du skulle komma, skulle jag ha
väntat.
Were you to agree to this, it would be disastrous.
Skulle du gå med på detta, vore det katastrofalt.
Differences between Swedish and English word
order
Major word order and sentence structure problems –
summary
A number of aspects of word order are similar in Swedish and English.
This summary concentrates only on the differences.
Key:
S
= subject FV = finite verb CA = clausal adverbial
T
= sentence element (non-subject) which may come first in the
sentence
W = word(s) moved for emphasis or presented as a new subject
1 Main clause – inversion (12.2 ff, 12.6.9, 12.7.1)
Swedish:
English:
S – FV – T
S – FV – T
Vi åker hem nu.
We’re going home now.
In Swedish non-subjects often come first in the main clause, and this
causes inversion of subject and finite verb.
T – FV – S
T – S – FV
Nu åker vi hem.
Now we’re going home.
In English the order is usually subject – verb. (cf. however: Up went the
lift.)