无疑是……

wúyí shì...

undoubtedly be... (无疑是……)

无疑是 means “is undoubtedly.” It strongly affirms an evaluation, identity, or conclusion.

Anchor example

这次合作无疑是双方发展的重要机会。

Zhè cì hézuò wúyí shì shuāngfāng fāzhǎn de zhòngyào jīhuì.

This cooperation is undoubtedly an important opportunity for both sides’ development.

HSK 6

1 structures

15 exercises

Lesson summary

Read the sample sentence and notice how 无疑是…… works in the frame: A 无疑是 B.

Explanation

无疑是 is formal and emphatic. It is often used before nouns or noun phrases such as 关键, 机会, 问题, 选择. Do not omit 是 when the following part is a noun phrase. Use it only when the speaker has strong confidence.

Structure Patterns

1 structures

Grammar pattern

A 无疑是 B

strongly affirms a judgement as beyond doubt

这次合作无疑是双方发展的重要机会。

Zhè cì hézuò wúyí shì shuāngfāng fāzhǎn de zhòngyào jīhuì.

This cooperation is undoubtedly an important opportunity for both sides’ development.

Common Mistakes

Omitting 是 before a noun phrase: 无疑重要机会。Use 无疑是 + noun phrase: 无疑是重要机会。
Using it for weak guesses.无疑是 expresses strong certainty.

Usage Notes

Strong certainty.
Often followed by noun phrases.
Formal evaluative tone.

Practice

15 exercises

1 / 15

Fill in the blank:

这次合作____双方发展的重要机会。

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