In Nouns^x, Compound subjects^x, Grammar^x

I had these exchanges before: Taka wrote: My dictionary says: ''Gerund AND gerund' , 'infinitive AND infinitive' and 'abstract noun AND abstract noun' are generally treated as singular when they are used as the compound subject of a sentence. Do you think this explanation is wrong? Grammar...

Grammar Geek wrote: Like "Running and swimming is my favorite form of exercise"? No. That would be "...are my favorite forms of exercise." This is a bit getting off the point of the original question, but let me ask. My dictionary says: ''Gerund AND gerund' , 'infinitive AND infinitive' and...

Yoong Liat wrote: There is a dog and two cats in his house. There are a dog and two cats in his house. Which is the correct sentence or are both okay? Hi Yoong Liat (should I say 'Hi Yoong' or 'Hi Liat'?) Let's start with a couple of links to my favourite sources: ...