Shell scripting - Is it possible to add two strings together to make 1 string?

[cchen]

say I run: script asdf qwert
Is it possible to create a string that says: asdf qwert
I need to use this with sed, I tried using $@ but it won't work with sed

 

[Barnaby W. Füi]

one=hello
two=world

three="$one $two"

 

[cchen]

Hmm.. it won't work with sed. gives me this error:
sed: -e expression #1, char 6: Unterminated address regex

this is what i called
name="$1 $2"
sed /$name/p -n /home/cs3157/public/march.tcm

 

[Barnaby W. Füi]

Don't know. I don't know any sed except for s///. That's how you put two strings together in bourne shell though.