Why katakana alone is not enough
Katakana can help memory, but it can also add vowels, soften final consonants, and make English rhythm too even. Words such as world, comfortable, through, and beautiful contain consonant clusters, reduced vowels, and stress patterns that katakana cannot fully show. Listen to the audio first, then use simple spelling and IPA to check the difficult detail.
Common pronunciation patterns to practice
Pay attention to /r/ and /l/ in right and light, /v/ and /b/ in very and berry, inserted vowels in clusters such as strike, final consonants in make, world, and route, and th being replaced with /s/ or /z/. English words also need one clear stressed syllable instead of every written vowel receiving equal weight.
Minimal pairs and contrast practice
Compare right/light, vest/best, and ship/sheep. Then practice consonant clusters with play/pray, glass/grass, and strike. For route, make, and world, close the mouth at the final consonant before using the word in a short sentence. Start slowly, then return to normal speed so the rhythm stays natural.
English stress is not Japanese pitch accent
Japanese pitch accent mainly changes pitch. English word stress uses length, loudness, vowel clarity, and rhythm. In pronunciation, make the AY syllable clearer; in comfortable, make KUMF stronger and shorten the surrounding weak syllables. This contrast makes long English words easier for listeners to recognize.
Start with word pages for world, beautiful, comfortable, and through. Listen once at normal speed, replay slowly to check that no extra vowel was added, then compare simple spelling and the stress line. Use the IPA chart when you need to verify /r/, /l/, /v/, /θ/, /ð/, or a stress mark.