Question

a) As soon as winter comes, birds migrate to the South.
b) No sooner ________
Rewrite a) sentence in the form of the b) sentence.

Answer 1

Hint: We use ‘no sooner’ to indicate an action, event or situation that occurs instantly after another action or event. We often use the ‘past perfect form of the verb’ and ‘than’ with ‘no sooner’.

Complete answer:
In certain sentences, we use ‘no sooner’ at the beginning of the sentence and invert the position of the subject and the auxiliary verb.
Example- No sooner had she started to walk than it began to snow. Here, we have used ‘[no sooner’ at the beginning of the sentence, followed by the interchanged positions of the auxiliary verb ‘had’ and subject ‘she’.
In the given question- We can conclude that as soon as the first action of ‘winter comes’, the birds perform the second action of ‘migrating to the South.’
The correct formation of the given sentence should be; No sooner does the winter come than the birds migrate to the South. Here, we can conclude that the action of birds migrating to the South takes place immediately with the coming of winter.
In the given formation- We have used the present tense, because the sentence indicates a fact or an action that happens every year. Also, we can see the use of ‘comes’ in the first sentence which indicates that the action is performed every time winter comes.
Hence, the correct answer is ‘No sooner does the winter come than the birds migrate to the South’.

Note:
Keep in mind, the phrase ‘no sooner than’ is not used in formal conversations or writing styles. It is only used in casual, informal conversations or writings.