先生は皆が理解できるようにゆっくり話します

先生: teacher, dr, doc, sir, doctor, professor, sensei, master, instructor
は: a, the, is, am, are, will
皆: everyone, all, everybody, everything
が: is, there, but, ga, will, however
理解: understand, understanding, comprehend, comprehension, understandable, figure, realize, realization
できる: can, be able to, be able, capable, manage to, accomplish, able to do
よう: like, way, kind, so that, such as, manner
に: in, to, on, at, into, upon
ゆっくり: slow, slowly, gently, calmly, leisurely
話す: talk, speak, speaking, tell
ます: will, to be, i will, to make, to do, to have