But most of all vs Especially vs Mainly

When to use each in English, with meaning, register, and examples.

But most of all

Top 2,000 (common)

Especially

Top 1,000 (very common)A2adverb

Mainly

Top 2,000 (common)B1adverb
Most common: Especially
 But most of allEspeciallyMainly
Pronunciation🇬🇧 //bʌt məʊst əv ɔːl//🇺🇸 //bʌt moʊst əv ɔl//🇬🇧 /["/ɪˈspeʃəli/"]/🇺🇸 /["/ɪˈspeʃəli/"]/🇬🇧 /["/ˈmeɪnli/"]/🇺🇸 /["/ˈmeɪnli/"]/
MeaningUsed to emphasize something very important.More than usual; particularly.mostly or for the most part
ExampleI love traveling, but most of all, I enjoy meeting new people.I enjoy all kinds of music, especially jazz.She mainly works from home to achieve a better work-life balance.
RegisterNeutralNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)Top 2,000 (common)
CEFR level-A2B1
Part of speechadverbadverb
Collocationsbut most of all, I think, but most of all, it's clear, but most of all, we shouldespecially important, especially interesting, especially for you, especially relevant, especially helpfulmainly for, mainly because, mainly concerned, mainly composed, mainly focused
Antonyms-especially not, not particularlyrarely, seldom, occasionally
Common mistakesUsing it as a complete sentence without context., Confusing with 'but above all', which has a similar but slightly different emphasis.Often misused as 'especial' which is incorrect., Confused with 'specially', which has different meanings., Used in negative contexts where it can sound awkward.Using 'mainly' instead of 'main' as an adjective, Confusing 'mainly' with 'mainly' as a conjunction, Placing 'mainly' at the beginning of the sentence incorrectly
Usage notesTypically used in conversations or informal writing to highlight a key point. Avoid in very formal contexts.Used to highlight a specific example or situation. Common in both spoken and written English but may sound overly formal in casual conversations.Use 'mainly' in sentences to indicate the primary focus or majority aspect. It fits well in formal and informal contexts but avoid it in casual speech where shorter alternatives may suffice.

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But most of all
Especially
Mainly

Frequently asked questions: But most of all vs Especially vs Mainly

What's the difference between But most of all, Especially, and Mainly?

But most of all: Used to emphasize something very important. Especially: More than usual; particularly. Mainly: mostly or for the most part

Which is more common: But most of all, Especially, and Mainly?

Especially is the most common in everyday English.

Which is more advanced: But most of all, Especially, and Mainly?

Mainly is the highest level, at B1, on the CEFR scale.

Can you show an example of each?

But most of all: I love traveling, but most of all, I enjoy meeting new people. Especially: I enjoy all kinds of music, especially jazz. Mainly: She mainly works from home to achieve a better work-life balance.

Can I use But most of all, Especially, and Mainly interchangeably?

Not always. But most of all, Especially, and Mainly are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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