Question

Alguém pode me dizer quias tempos verbais existem neste texto ?
High-profile attacks on major cities in Belgium, France and the United States have set the world on edge.
Commentators are talking of a new kind of protracted guerrilla war stretching from the Americas and Europe across Africa, Asia and the Arab world. This one is irregular, hybrid and networked, involving a constellation of terrorist organizations such as ISIS and Al Qaeda. Rather than hitting specific groups of people or symbolic sites, cities themselves are coming under siege. Complicating matters, violent extremists are recruiting directly from poorer and marginal neighbourhoods across the West.
The extent of local recruitment and so-called “extremist travelling” from Western countries is certainly cause for concern. One study estimates that as many as 31,000 people from 86 countries have made the trip to Iraq or Syria to join ISIS or other extremist groups since June 2014. It is not just Western Europe or North America that is proving to be fertile ground for so-called remote radicalization, but also Russia and Central Asia. Many foreign fighters are killed while fighting abroad, but as many as 30% of them eventually make the trip back home. Politicians are scrambling to respond and hate crimes against minority groups are on the rise.
It is statistically undeniable that terrorist violence is on the rise. But is today’s terrorist violence really more intense and widespread than in, say, the 1960s and 1970s? Are Western European and North American cities really the new front line of a global jihad? The answer partly depends on how terrorism is defined. There is currently no international legal or even academic agreement on what constitutes terrorism. Some experts say that it consists of violence perpetrated by non-state actors against civilians to achieve political religious or ideological change, but that sounds a lot like armed conflict. Complicating matters, governments routinely conflate terrorism and insurgency.

Answer 1

 Present Perfect, Present Continuous,Present Simple