1. Two glasses of water amount a bottle of water.

2. Two glasses of water amounts a bottle of water.

(Which one is right? Do we have to use a singular verb or a plural verb?)

3. 100 grains of rice amounts to a cup of rice.

4. 100 grains of rice amount to a cup of rice.

(Which one is correct? Thank you for your help. Have a great weekend. It's hot today here.)

Actually, neither is correct.

1. Two glasses (plural) of water amount TO a bottle of water.

2. Two glasses of water amount TO a bottle of water.

3. 100 grains (plural) of rice amount to a cup of rice.

4. is correct.

Sra

Both sentences in question 1 are incorrect. The correct sentence would be:

"Two glasses of water amount to a bottle of water."

In this case, we use the plural verb "amount" because we are referring to two glasses of water, which is more than one.

Regarding question 3 and 4, the correct sentence would be:

"100 grains of rice amount to a cup of rice."

Again, we use the plural verb "amount" since we are referring to 100 grains of rice, which is more than one.

I hope this clarifies the correct usage of singular and plural verbs in these contexts. If you have any further questions, feel free to ask. Have a great weekend! Stay hydrated in the hot weather.