a great deal of
a great deal of — idiom
1. used before a noun to show that something exists or happens in large numbers, am
used before a noun to show that something exists or happens in large numbers, amounts, or to a high degree
Sari spent a great deal of time helping her younger brother with his math homework.
used with uncountable noun: time
The hospital project cost a great deal of money but will help thousands of patients.
used with uncountable noun: money
Wei put a great deal of effort into studying and passed with top marks.
Antonia and Imran did a great deal of research before choosing a new apartment.
There is a great deal of evidence that walking daily improves both body and mind.
- a lot of
less formal, more common in everyday speech
- a large amount of
very similar in meaning, used with uncountable nouns
- plenty of
suggests more than enough, slightly less emphatic
- a good deal of
slightly more formal, same grammatical pattern
- a small amount of
direct opposite, used with uncountable nouns
- a little
implies a small quantity, more general
文法句型
a great deal of + uncountable noun
a great deal of + plural countable noun
用法筆記
This phrase is mainly used with uncountable nouns such as time, money, effort, and work. For plural countable nouns, 'a large number of' or 'many' is more natural in most contexts.