まさかI never dreamed, Never, No way, Don't tell me, You don't say

Both expressions can be used to convey shock and surprise, though how they function in a sentence differs. まさか precedes whatever the speaker is surprised about, e.g. まさか勝てるなんて ('To think they could win!'), or even on its own as an interjection, i.e. まさか！ ('No way!). In contrast, とは always follows what the speaker is surprised about, and can pair with まさか for further emphasis, e.g. まさか勝てるとは (same meaning as the above example).

まさか and とは are both used to express surprise, but function in different ways. まさか comes at the beginning of a sentence to emphasize that what follows goes against the speaker's expectations, while とは appears at the end of a sentence or phrase to express the same. Because they occupy different positions, they are often used together. For example, まさか勝てるとは！ ('To think we could win!' / 'I never thought we could win').

まさか and なんか・なんて are both used to express surprise, but function in different ways. まさか comes at the beginning of a sentence to emphasize that what follows goes against the speaker's expectations, while なんて appears at the end of a sentence or phrase to express the same. Because they fill different roles, they are often used together. For example, まさか勝てるなんて！ ('To think we could win!' / 'I never thought we could win').