1. Sweetheart, did you apply the cosmetics/lotion on your face?
2. Sweetheart, did you wear the cosmetics/lotion on your face?
3. Sweetheart, did you put the cosmetics/lotion on your face?
(What about the expressions? Are all expressions grammatical? Do we have to use the singular form 'cosmetic' or the plural form 'cosmetics' in this case?)
The first and third are good; I guess the second one is, too. But the third one is the most commonly used. And yes, it's "cosmetics."
All three expressions are grammatically correct and can be used interchangeably. The choice between using the singular form "cosmetic" or the plural form "cosmetics" depends on the context.
1. "Sweetheart, did you apply the cosmetics/lotion on your face?"
In this case, both "cosmetics" and "lotion" serve as a general term for any cosmetic products or lotions that may have been used. "Cosmetics" as a plural noun refers to a range of products in general, while "lotion" refers specifically to a type of moisturizing product. The use of either term here implies that multiple products may have been used on the face.
2. "Sweetheart, did you wear the cosmetics/lotion on your face?"
In this expression, "wear" suggests that the cosmetic products or lotion were applied in a way that they are still visible on the face. It implies that the products were intentionally applied as part of a beauty routine or makeup look.
3. "Sweetheart, did you put the cosmetics/lotion on your face?"
This expression is similar to the first one, using "put" instead of "apply." It also refers to the act of placing the products on the face without necessarily implying they are still visible.
In summary, all three expressions are grammatically correct and convey a similar meaning. The choice between "cosmetics" or "cosmetic" depends on whether you want to emphasize a range of products or use a more general term.