The shape of AB3E type molecule is

AB3E (or) AB3L means  the molecule on central atom contains 3B [3 - bond pairs] & 1E [1 lone pair] . That  means on central atom 4 - pairs of electrons are available.4 electron pairs  ⇒ 3 B.P's + 1 L.P ⇒ sp3 ⇒ pyramidal