We actually have talked about this topic, but it was years ago. If you missed the session, you can read it through this link (https://englishtips4u.com/2011/06/29/engtips-giving-examples/).
It was a short session though. So, today I would like to discuss more about ‘giving example.’
Example is something that is used to support an idea, argument, or opinion. We can mention anything, as long as it is related to the topic, such as events, names, research findings, places, etc.
In other words, an examples act as an evidence to prove an idea. We can also explain something by giving examples. There are some well-known phrases everyone may use in order to give examples. They are ‘for example,’ ‘for instance,’ ‘such as’ and ‘e.g.’
This phrase is generally demonstrated, whether in spoken or written expression. We can say as well as write ‘for example’ while giving a further supports of our opinion.
However, in the case of written communication, this phrase might give the audience ‘less formal’ sense. So, if you are working on formal documents, such as business letters or academic essays, you can put ‘for instance’ instead of ‘for example.’
In the same way, we can also apply it in both written and spoken communication. However, as I mentioned in the previous tweet, people tend to used it in a formal condition. For alternatives, you could use ‘to illustrate’ or ‘as (an) illustration.’
I, personally, think this is the most flexible phrase. We can say or write it in both formal and casual communication. Cambridge Dictionary said ‘such as’ is more formal than ‘like.’ So, if you want to simply give some examples in your speech or essay, you can choose ‘such as.’
It is abbreviation of Latin, exempli gratia, which has the same meaning of ‘for example.’
‘e.g.’ is used in written expression only. Though I read an article about Latin as an academic language, I suspect it is used in academic purpose only. Moreover, I often saw ‘e.g.’ in news articles, study-related writings or academic papers.