Onver/AT the weekend, I have writwroten a journal about the bats that had flown into my bedroom. Over/AT the weekend, I wrote a journal about the bats that had flown into my bedroom.

At/Over the weekend - "at" is for something that you did at ONE POINT in the weekend; "over" is for something you did all/on two or more days of the weekend: If you wrote the journal in 20 mins on Sunday = "At the weekend..." If you started the journal on Saturday afternoon and finished Sunday night = "Over the weekend..." "have written" is perfectly good, "wrote" just sounds more natural to me in this context.

On theLast weekend, I haved written a journal about the bats that had flown into my bedroom. Last weekend, I had written a journal about the bats that had flown into my bedroom.

First, I tried to convince the bats to leave not because I was worried, but because I was not sure how my wife would react to them. First, I tried to convince the bats to leave not because I was worried, but because I was not sure how my wife would react to them.

What are you convincing them to do? To stay for dinner or leave your house? (I'm assuming you wanted them to leave)

I knoew that she has a panics when she sees a toad, but about bats, I didn't know. I knew that she panics when she sees a toad, but about bats, I didn't know.

Making both your "know" forms past tense sounds more natural than one present and one past. Both being past tense would work too.

I know that she has a panicfit when she sees a toad, but about bats, I didn't know how she would feel about bats. I know that she has a fit when she sees a toad, but I didn't know how she would feel about bats.

When she came back from work (she works on weekends, her job is one of those people applauded to recently), everything was fine. When she came back from work (she works on weekends, her job is one of those people applauded recently), everything was fine.

When she came back from work (she works on weekends, her job is one of those people applauded to recentlately), everything was fine. When she came back from work (she works on weekends, her job is one of those people applauded lately), everything was fine.

Recently is also fine, but 'lately is more natural.

It's the most common species of bats in here, and in summer, they look for a new place to sleep every morning. It's the most common species of bats here, and in summer, they look for a new place to sleep every morning.

"in here" sounds like they are the most common IN YOUR HOUSE. No "in" makes it sound more like your region/country

It's the most common species of bats inaround here, and in summer, they look for a new place to sleep every morning. It's the most common species of bats around here, and in summer, they look for a new place to sleep every morning.

So, they haven't come back. So they haven't come back.

Maybe I will invest into bat houses this autumn. Maybe I will invest in bat houses this autumn.

Maybe I will invest into bat houses this autumn. Maybe I will invest in bat houses this autumn.

If they are not high enough above ground, the bats dwon't find them. If they are not high enough above ground, the bats won't find them.

"Won't" or "can't."

Climbing up really high on the ladder and drilling holes up there is, on the other sidehand, a bit dangerous. Climbing up really high on the ladder and drilling holes up there is, on the other hand, a bit dangerous.

"On the other hand" is usually at the beginning of a sentence but it works here just fine.