Academic writing มักมีการใช้การกล่าวถึงปริมาณบ่อยๆ จะใช้singular or plural verbยังไงให้ถูกต้อง ยกตัวอย่าง
* In total, 10 g of tissue was tested. (NOT: 10 g of tissue were tested)
* Five milliliters of solvent was added to the mixture. (NOT: Five milliliters were added)
เนื้อเยื่อ10กรัม และสารละลาย5ml ให้ถือเป็นก้อนเดียว จึงใช้ was
* In total, 30% of the study duration was spent on the follow-up testing.
* Here, the duration (an amount of time) can be thought of as a single block, not as countable units.
* Twenty percent of the participants were assigned to the experimental condition.
* In this example, each participant was assigned to experimental or control conditions, and the number of individual patients assigned to the experimental group constituted 20% of the total patient sample.
สำหรับเปอร์เซ็นต์ ถ้าเปอร์เซนต์ของสิ่งที่เป็นคำนามนับไม่ได้ ใช้ was
The term amount of is used for things you cannot measure, i.e., non-countable nouns. Amount of usually precedes a singular word.
Examples:
* I undertook an inordinate amount of work.✔️
(Work is a non-countable noun. It is singular and cannot be measured or counted.)
* She had a certain amount of respect for the sales team, but she always dissented when they spoke at meetings. ✔️
(Respect is singular and cannot be measured or counted.)
* It is not difficult to see where that amount of hate derives. ✔️
(Hate is singular and cannot be measured or counted.)
* The amount of women in London who flirt with their own husbands is perfectly scandalous. It looks so bad. It is simply washing one's clean linen in public. ❌ (Women is plural and can be counted. This should be the number of women.)