also

 
Pronunciation: /ˈɔːlsəʊ/

adverb

  • in addition; too: a brilliant linguist, he was also interested in botany dyslexia, also known as word blindness [sentence adverb]: also, a car’s very expensive to run

Origin:

Old English alswā 'quite so, in that manner, similarly' (see all, so1)

Grammar

This is an adverb, used to link items in a sentence or to make links between sentences. For example: The oxygen they produce benefits the fish, and they also provide a source of food and shelter. It is frequently used with and or but, but it is not a conjunction. In formal writing also should not be used instead of and: The closet is larger than a pit and therefore lasts longer also it is easy to empty. Here the speaker needs to add and (→ and also), or replace also with and.