What Are the Best S Tongue Twisters To Improve My English?

Hiii! I'm 14 and I really want to practice my level of English in conversation with a native speaker We can talk about any topic .In return I can help you learn Russian and explain something!!) I'm waiting for your response!!

This transcript comes from a British English listening exercise. I am wondering about the meaning of 'cooker' here. Does it mean 'oven'? I checked the dictionary and 'cooker' means cooking appliance, which in both British and American English doesn't represent 'oven'. However, according to the context, it feels like it means 'oven', and I find this confusing.

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Hi! In this sentence, does "perceive' convey something different from the use of "realize" or "know"? "The youngster must perceive the relationship between success and effort"

Hi! In the following sentence, does "can" have to be "can"? Can "could" be an option? I am thinking if there is a conventional or grammatical rule for this😨 "Whether he was doomed, you can never tell"

Why an average, not the average? Why does it have to be general sense? "Tuition increased by an average of three percent at universities last year."