Common Mistakes:

1 Avoid the following common mistake. The relative clause should go immediately after the thing it describes:

Suzie, who started here after me, was given a promotion.

Suzie was given a promotion who started here after me.

Because the relative clause describes Suzie, it should come directly after the word Suzie in the sentence.

2 Also avoid this common mistake where the sentence is left unfinished:

The new manager, who has a degree in Business Management.

The new manager who has a degree in Business Management starts Monday.