an adverb is a word or phrase that modifies or qualifies an adjective, verb, or other adverb or a word group, expressing a relation of place, time, circumstance, manner, cause, degree, etc. In this capacity, 'also' is used to emphasize an additional point in a sentence. To make it easier to understand, it can also be thought of as an intensifier – making a point more distinct and evident to the listener or reader. Additionally, it is used in sentences that already have one or more points; therefore, adding 'also' creates a string of points that show a relationship, either as a cause-effect or in time sequence.
1. I'm running late, also I might need an extra hour to get there.
2. She has been feeling very lonely lately, also she is very discouraged.
3. Not only did he finish the project ahead of the deadline, he also did a really good job.
always add a comma before 'also' when it is used at the beginning of a sentence. When connecting two items in a list with 'also,' use commas to separate both items. 'Also' can also be used to restate a point made in a previous sentence or in an earlier part of the conversation. Be sure to also use other words and phrases like 'in addition,' 'what’s more,' or 'furthermore' to avoid overusing 'also.'