Adverbs such as 'fortunately' and 'perhaps' which apply to the whole clause, ratherthan to part of it, are sometimes called sentence adverbs.
English Easy Learning GrammarAdverbs and adverbialsWhen you want to add information about how, when, where, or to what extent somethinghas happened, you can use an adverbial. Many adverbials are members ... Read more
sentence adverb in British English
(ˈsɛntəns ˈædˌvɜːb)
noun
linguistics
adverbs such as 'fortunately' and 'perhaps' which apply to the whole clause, rather than to part of it, are sometimes called sentence adverbs