'I invite' vs 'I'm inviting'? / 'appears' vs 'is appearing'? Can someone explain to me why the answer to the first exercise is the letter A and to the second is the letter B , please? Book exercise: Read each pair of sentences below, A and B. The sentence which follows each pair is related to one of the sentences in the pair. (For example, it could come after the sentence or describe the sentence.) A: I invite everyone present to the opening of the new superstore. B: I'm inviting everyone to the opening of the new superstore. 'I'm offering this invitation to you now' A: The dance group appears to have arrived at the theatre. B: The dance group is appearing at the theatre. 'There are performances every evening' Thank you in advance!