What do you like to do on a rainy day? What do you like to do on a rainy day?

When the weather is bad and outside we can notice rainit is raining outside, I prefer to stay in the house. When the weather is bad and it is raining outside, I prefer to stay in the house.

"I prefer to stay in the house" is an independent clause while "When the weather is bad and it is raining outside" is a dependent clause. When a sentence starts with a dependent clause, there should be a comma after the dependent clause and before the independent clause. It is raining outside sounds more natural than "outside we can notice rain." It would also sound natural to say "When it is raining outside, I prefer to stay in the house."

When the weather is bad and outside we can noticeand it’s raining, I prefer to stay inat housme. When the weather is bad outside and it’s raining, I prefer to stay at home.

When the weather is bad andrainy outside we can notice rain, I prefer to stay in the house. When the weather is rainy outside, I prefer to stay in the house.

When the weather is bad and outside we canand it is noticeably raining, I prefer to stay in househome / indoors. When the weather is bad outside and it is noticeably raining, I prefer to stay home / indoors.

Meaning here is unclear - I took a guess at your meaning

Honestly, rains isn't bad,. I like running while raindrops are falling on me. Honestly, rain isn't bad. I like running while raindrops are falling on me.

In this case, the singular form of rain would be used.

Honestly, rains isn't bad,. I like running while raindrops are falling on me. Honestly, rains isn't bad. I like running while raindrops are falling on me.

Honestly, rains isn't bad,. I like running while raindrops are falling on me. Honestly, rain isn't bad. I like running while raindrops fall on me.

Honestly rains isn't bad, I like running while raindrops are falling on me. Honestly rain isn't bad, I like running while raindrops are falling on me.

I like the smell of the air when it's raining. I like the smell of the air when it's raining.

It's raining needs an apostrophe because it brings the word it and is together to create one word.

I like the smell of the air when it’s raining. I like the smell of the air when it’s raining.

I like the smell of the air when it's raining. I like the smell of the air when it's raining.

I like the smell of the air when it's raining. I like the smell of the air when it's raining.

Thisese things are really cool, but I do not like to do this every time it rains. These things are really cool, but I do not like to do this every time it rains.

Because things is plural, the plural form of this should be used. These is the plural form. I added a comma because the sentence has two independent clauses separated by a conjunction. "Every time it rains" sounds more natural, but what you put originally is grammatically correct.

This things are really cool but I do not like to do this every time it rains. This things are really cool but I do not like to do this every time it rains.

I don’t understand this sentence

This things are really cool butHowever, I do not like to do this every time it rains. However, I do not like to do this every time it rains.

This thingese experiences are really cool but I do not like to do this every time it rains. These experiences are really cool but I do not like to do this every time it rains.

More often I prefer to stay in house and watch TV or play some games. More often I prefer to stay in house and watch TV or play some games.

More often I prefer to stay inant housme and watch TV or play some games. More often I prefer to stay ant home and watch TV or play some games.

More often I prefer to stay in the house and watch TV, or play some games. I prefer to stay in the house and watch TV, or play games.

More often I prefer to stay in houshome and watch TV or play some games. More often I prefer to stay home and watch TV or play some games.