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 can deal with a large energy drop.

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.