present continuous or present perfect continuous?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hello everyone,

Recently, in science, criticism of this theory is/has been increasingly gaining momentum and new concepts are/have been emerging.

Which tense is more appropriate - the present continuous or the present perfect continuous?

Thank you.

2

I would suggest present perfect continuous because of the presence of the adverb ‘recently’. This suggests the idea that the criticism is both current had has been around over a period of recent time up till now.

Alan

3

Thank you, Alan.