Определите временные формы глагола. укажите их инфинитивы. 1) scientists have produced a stable chemical compound to store the energy. 2)The support of some boilers is on bottom. 3) First pressure stage of the impulse turbine c...

1) Scientists have produced (pres perf - produce) a stable chemical compound to store the energy. 2) The support of some boilers is (pres simp - be) on bottom. 3) First pressure stage of the impulse turbine can deal (pres simp - can) deal (unfinitive - deal ) with a large energy drop.