But the latest musician to take Cyrus to task is indie singer/songwriter Sufjan Stevens—not for Cyrus’s outrageous behavior but for her failure to grasp the present perfect continuous tense.

We use the present perfect continuous to talk about an activity that started in the past and is continuing now or has recently finished. Some verbs are almost never used in the present perfect ...

Most reference books say that the present perfect continuous tense has no passive form. Yet, at the same time, we have seen these sentences: 'This building has been under construction for four ...