There are many books and websites that will show you how to format a script properly; many of which I reference on my blog. However, the BBC Writer’s Room has some excellent straightforward examples of screenplay formats that may give you a quick overview of how a script for film or TV should look like.
Format (film and TV Dramas) – Film script example PDF
Format (TV shows incl. act breaks) – TV script example PDF

References:
BBC.co.uk. (2017). BBC – Medium and Format – Writers Room. [online] Available at: http://www.bbc.co.uk/writersroom/writers-lab/medium-and-format#heading-script-examples [Accessed 15 Jul. 2017].
Carless, M. (2004). Screenplay Format. [online] BBC.co.uk. Available at: http://downloads.bbc.co.uk/writersroom/scripts/screenplay.pdf [Accessed 15 Jul. 2017].
Carless, M. (2004). Screenshot of script example from the BBC Writer’s Room. [image] Available at: http://downloads.bbc.co.uk/writersroom/scripts/screenplay.pdf [Accessed 15 Jul. 2017].
Carless, M. (n.d.). Screenplay format for TV shows. [online] BBC.co.uk. Available at: http://downloads.bbc.co.uk/writersroom/scripts/screenplaytv.pdf [Accessed 15 Jul. 2017].