Find out the subject, in the following sentence : The beautiful rainbow soon…

To find the subject of a sentence, identify the noun or noun phrase that performs the action of the verb. In the sentence 'The beautiful rainbow soon faded away', the verb is 'faded'. The subject is the one that performs the action of fading. The phrase 'The beautiful rainbow' is the noun phrase that does this. It includes a definite article ('The'), an adjective ('beautiful'), and a noun ('rainbow'). Therefore, 'The beautiful rainbow' is the subject.