Question 1

What is the difference between both and all?

Accepted Answer

"Both" is used for exactly two items and means "the two together": "Both brothers play football" (there are two brothers, and they both play). "All" is used for three or more items and means "every one in the group": "All three brothers play football" (there are three or more, and every one plays). You cannot use "both" for three or more things — "Both three options are good" is wrong; use "All three options are good." Similarly, "all" sounds awkward with just two items — "All two students passed" is unusual; use "Both students passed." A helpful rule: if you can count exactly two, use "both." If there are three or more (or the number is unknown), use "all."

Question 2

Does "neither" take a singular or plural verb?

Accepted Answer

In formal English, "neither" takes a singular verb because it refers to "not one and not the other" — each item is considered individually: "Neither answer is correct" and "Neither of them was ready." In informal spoken English, you will often hear a plural verb: "Neither of them were ready" — this is very common but not recommended for exams and formal writing. When "neither...nor" connects two subjects, the verb agrees with the subject closest to it: "Neither the teacher nor the students were aware" (plural — "students" is closest). This subject-verb agreement rule is tested at B1 and B2 level in Cambridge grammar examinations.

Question 3

When do I use "either" in negative sentences?

Accepted Answer

"Either" appears in negative sentences to mean "also not" — it goes at the end: "I don't like horror films." "I don't either" (= me also not, I agree). This is the negative equivalent of "too" or "also" in positive sentences: "I like comedies." "I do too" (positive agreement). "Either" also appears in "not...either" to express the same idea within one sentence: "She doesn't speak French, and she doesn't speak German either" (she speaks neither language). Do not confuse this with "neither," which works differently: "Neither do I" (also a negative agreement, but with inverted word order). Both "I don't either" and "Neither do I" are correct and mean the same thing.

All, Both, Neither, Either Exercises

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