Answer:
abab
Step-by-step explanation:
Rhyme scheme refers to the pattern in which the end words are written. Usually, the rhyme scheme is used in the poems and songs. It adds physical effect in the poem and also helps to memorize them easily. In the given poem, the rhyme scheme is ABAB. In the first line, the last word is 'us' which rhymes with the last word of the third line which is 'us'. Similarly, the last word of the second line is 'know' which rhymes with the last word 'go' of the fourth line.