Some examples of cases when the normal word order in an English sentence is changed.

1. INVERSIÓN DEL SUJETO
Cuando empieza la frase con here o there:
Here comes Peter.
Pero cuando el sujeto es un pronombre la frase sigue el orden normal:
Here they are.
Con so (=también) y neither .(=tampoco):
He’s hungry and so am I.
He hasn’t got any money and neither have I.
Con adverbios de frecuencia con fuerza negativa –never, seldom, rarely- cuando
empiezan una frase.
Hardly had you left when he arrived.
Never have I seen such a pretty girl.
Si es un verbo ordinario en presente o pasado se usa el auxiliar do / did delante del
sujeto:
Not only does he want yours but also mine.
No sooner/ not only:
No sooner had she arrived than she started to complain.
Not only is the exam difficult but it is also long.