Original sentence: Thus, while an English speaker may say "one person" or "this person", a Chinese speaker must say  (yí ge rén, one-CL person) or  (zhè ge rén, this-CL person).When a noun is preceded by a number, a demonstrative such as this or that, or a quantifier such as every, a classifier or measure word must appear directly before the noun
Edited sentence: Thus, while English speakers say "one person" or "this person", Chinese speakers must say  (yí ge rén, one-CL person) or  (zhè ge rén, this-CL person).When a noun is preceded by a number, a demonstrative such as this or that, or a quantifier such as every, a classifier mandatorily appears directly before the noun