hơn / gần + Number

hơn (more than) and gần (nearly) function as pre-quantifier adverbs. They attach directly to the front of a number or quantifier word (like nửa "half" or chục "ten") to establish a strict unidirectional estimate.

• hơn + Number: Establishes a strict lower bound (the actual amount is greater than the number).
• gần + Number: Establishes a strict upper bound (the actual amount is approaching, but less than, the number).

Key Nuances for Advanced Learners:
1. Unidirectional vs. Bidirectional: Unlike words such as khoảng or chừng (approximately), which mean the number could be slightly higher OR lower, hơn and gần only go in one direction. However, they are frequently combined (e.g., khoảng hơn 2 tiếng, chừng gần 50 người) to soften the strictness of the boundary.

2. Age Limits and Milestones: Both trên (above) and ngoài (outside/over) are fully interchangeable with hơn when discussing a person's age (e.g., trên 70 tuổi, ngoài 70 tuổi, and hơn 70 tuổi are all perfectly natural and grammatically correct). However, while ngoài works for large, round milestones (e.g., giá ngoài 20 triệu) or points on a scale like points in time (e.g., ngoài 2 giờ sáng), it is not interchangeable for general durations or specific measurements (e.g., hơn 2 tiếng is standard, whereas ngoài 2 tiếng sounds unnatural).

3. Not Just for Space or Comparisons: It is a common misconception that gần is only a spatial preposition (near) and hơn is only a comparative marker (like in comparisons). Before numbers, they are fully standard adverbs of approximation.

4. gần vs. gần như: Use gần for simple counting with numbers. While gần như (almost/practically) is typically used before verbs or adjectives (e.g., gần như hoàn hảo = almost perfect), it can also be used before numbers when dealing with percentages, fractions, or absolute totals (e.g., gần như 100%, gần như một nửa).

5. Post-Noun Placement of hơn: Note a crucial structural difference: hơn can sometimes be placed after units of time (like năm, tháng) or measurement (like ký, mét). However, this highly colloquial structure carries a specific nuance of 'and a bit' (a very small, marginal excess). For example, hai năm hơn means 'two years and a bit', which is slightly different from the standard hơn hai năm (more than two years). Note that gần cannot be used this way (hai năm gần is ungrammatical), and hơn cannot be placed after general nouns (e.g., mười người hơn is ungrammatical).

6. hơn vs. mấy: When dealing with multiples of ten, hơn (e.g., hơn hai mươi) means 'more than twenty' (could be 21, 25, 29, etc.), whereas mấy placed after the ten (e.g., hai mươi mấy) specifically means 'twenty-something' (between 21 and 29).

7. Word Order with Classifiers: When a noun and a classifier are involved, the standard word order is hơn / gần + Number + Classifier + Noun (e.g., hơn ba con mèo = more than three cats, gần năm chiếc xe = nearly five cars).