I’ve I’ve

I’ve just studied English on the train.
I’ve checked my bag to make sure I hadn't forgotten anything.

I usually I have forgotten anything when I’ve went to camping.

I usually checked my bag make sure 3times.

I’ve checked my bag to make sure I hadn't forgotten anything for 5hours.
I usually I have forgotten anything when I’ve went to camping since 3 years.

I usually checked my bag make sure 3times