Another common use of ties is connecting notes across a bar line. A tie is the only way of indicating that a note or chord is meant to be sustained across a bar line. Here is an example demonstrating the use of the tie across a bar line.
To finish off this section, here is an example using all the moveable 7th chord shapes you have learned, but in the key of E instead of C. It also makes use of rests as well as ties, both within a bar and across the bar line. When a bar repeat sign is placed on the bar line, it indicates that the previous two bars are to be repeated.