1. (pronoun) this; these
2. (bound form) this; the (followed by a noun)
3. (bound form) this; these (followed by a classifier) (in this sense, commonly pr. zhèi, esp. in Beijing)

1. to be (followed by substantives only)
2. correct; right; true
3. (respectful acknowledgement of a command) very well
4. (adverb for emphatic assertion)

1. a; an; one
2. the whole (afternoon, summer vacation etc)

1. Combination of the numeral 一 (“one”) and the generic classifier 個／个: a; an; one
2. same

classifier: 個