All Fo Sudden

[ALL OF SUDDEN]

hi there,

Could you make out what does 'all of a sudden' mean with an appropriate example?

If you can do the same with the following gramatical words I will be more grateful.

Subsequently

Alternatively


Thanks in advance.
James

[Anglika]

It means "very suddenly"

We were walking along the road at night. All of a sudden a large black dog appeared.

With the other two words - try producing your own sentences using them for us to comment on.