1. He is taking a picture.

(Does it mean that he is taking one picture?)

2. He is taking pictures.
(Does it mean that he is taking more than two pictures?)

1. Yes. "a picture" indicates just one.

2. Yes, "pictures" is plural, so that means that he is taking more than one.

In both sentences, the verb "is taking" indicates an ongoing action happening in the present moment. However, the meaning regarding the number of pictures being taken can be inferred differently based on the context.

1. "He is taking a picture." This sentence suggests that he is in the process of capturing a single image at the current time. The use of the indefinite article "a" implies one singular picture.

2. "He is taking pictures." In this case, the plural form of the noun "pictures" suggests that he is capturing multiple images. However, the precise number of pictures being taken is not specified in this sentence. It could be two, three, or any number higher than one. It simply means that he is capturing more than one picture at the present moment.