The differences are the following: Can't - is used to express that something is not possible to be done or happen, the person lacks ability, or it is prohibited. E.g.: a) I can't swim today because I have to work. (not possible to be done) b) It can't be spring since there aren't flowers yet. (not possible to happen) c) Sheila can't speak Japanese. (she lacks ability) d) Sorry, you can't park here. (prohibited) Couldn't - is used to express that something is not possible to be done or happen, the person lacks ability, or it is prohibited but in the past. E.g.: a) a) I couldn't swim yesterday because I had to work. (not possible to be done) b) It couldn't be spring since there weren't have flowers yet. (not possible to happen) c) Sheila couldn't swim when she was a child. (she lacked ability) d) I couldn't park my car because that was a prohibited area. (prohibited) Can't have - is used to express in the present that a recent event is not possible to have happened because it is very unlikely or impossible. E.g.: a) It can't have been the baby who ate the cookie. It is too small to have reached the table. (it is very unlikely) b) It can't have been Mary who wrote that beautiful message. She doesn't write very well. (it is very unlikely) c) John can't have used my clothes. They don't fit him. (it is very unlikely) d) Tina can't have driven the car today. She has been with me the whole day. (it is impossible) Couldn't have -is used to express in the past that an event was not possible to have happened because it was unlikely. It is also used to indicate admonition about a past event. E.g.: a) I couldn't have failed the test. I studied a lot for it and I knew all the answers. (it was absurd) b) Mike couldn't have been with us yesterday because he's been traveling since last week. (it is impossible) c) You couldn't have kept them waiting. They were important clients for the company. (admonition about a past event)

Para parar los climas extremos, nosotros necesitamos enfocarnos en el daño al medioambiente producido por las grandes corporaciones. Una persona normal puede ayudar solo un poco porque el mayor daño es por culpa de las grandes corporaciones . Ellos queman petróleo en el mar y tiran basura y sustancias químicas en el mar que contribuyen a más polución. Para pararlos, nosotros necesitamos hacer leyes y regulaciones apropiadas globalmente que hagan con que las grandes corporaciones paren de polucionar nuestro medioambiente.

For: about the duration of a time period. Since: marks an action that started in a specific time in the past. Bearing this in mind, the most appropriate answer is FOR.

Большое спасибо!

I'd say "I don’t wanna wake up", it gives more emphasis. (most natives almost never say only "wake") "When every day just feels just like the other" > "When every day feels just like another one/day" Life keeps on promising > Life keeps (on) being promising (meaning it has good possibilities in the future. Only people promise things) It’s always promising (here it would sound more like an adjetictive, just like the correction I made), so it's Okay.

Disproportionate means "out of proportion" meaning it's too much/many or too little/few. Proportion means "the number or amount of a group or part of something when compared to the whole."

A mí me gustan las canciones románticas. Mi cantante favorito es Luis Miguel. Sin embargo, mi canción predilecta es “ la barca “ . Música (sentido geral), estaría correcto si hubieras escrito "la música romántica" como género. Canción (músical individual; canção) ¡Muy bien!

Cuando viajo sola, usualmente tengo la intención de ver a alguien que conozco. Entonces… ¿Estoy sola si me reúno con un amigo? Boston y Hollywood han sido mis lugares favoritos. Me encanta Boston por su diversidad de culturas y Hollywood por su montañas y puestas de sol. Cuando estaba en estos lugares me sentía joven, libre, y hermosa.