Inside CONCATENATE
you can use TRANSPOSE
if you expand it (F9) then remove the surrounding {}
brackets like this recommends
=CONCATENATE(TRANSPOSE(B2:B19))
Becomes
=CONCATENATE("Oh ","combining ", "a " ...)
You may need to add your own separator on the end, say create a column C and transpose that column.
=B1&" "
=B2&" "
=B3&" "