Parts of speech (kelas kata)
He = pronoun
is = verb (main verb, verb be)
smart = adjective
Is di kalimat ini adalah main verb yang punya arti sendiri (= memiliki ciri/karakteristik/sifat, dalam kondisi, berada di)
Rumus:
is + noun phrase
is + adjective
is + adverb of location
is a student (= adalah seorang siswa - saat ini, present simple)
is sick (= dalam kondisi sakit - saat ini, present simple)
is outside (= berada di luar - saat ini, present simple)
Parts of speech (kelas kata)
He = pronoun
is = verb (auxilliary verb, verb be)
studying = verb (main verb, verb ing)
Is di kalimat ini adalah auxilliary verb. Verb ini tidak punya arti sendiri dan berfungsi membantu membentuk kalimat present continuous tense.
Rumus:
is + verb -ing
is eating (= sedang makan - present continuous)
is reading (= sedang membaca - present continuous)
is walking (= sedang berjalan - present continuous)