How to pronounce "fill it in" in English — Connected Speech Guide (IPA /ˈfɪlɪˈɾɪn/)

How native English speakers pronounce "fill it in" (IPA /ˈfɪlɪˈɾɪn/) — connected speech rule, example sentences, and audio for GA and RP. Free. fill-it-in links; GA flap

fill it in pronunciation (IPA /ˈfɪlɪˈɾɪn/) — Linking

What happens in this phrase

fill-it-in links; GA flap

Example sentences

Please fill it in on the form.
Can you fill it in?
I'll fill it in later.
fill it in carefully.

Common mistakes by native language

Japanese speakers

Mistake: Pronouncing all three words separately with a vowel inserted after each consonant: "FIRU ITTO IN".

Why: Katakana rendering treats each word as an independent closed syllable, so the chain-linking across "fill it in" gets broken into three disconnected chunks.

Fix: Flow through all three words as one unit: the l of "fill" links to "it", and the flapped t of "it" links to "in": [ˈfɪlɪˈɾɪn].

Korean speakers

Mistake: Fully releasing the l of "fill" and the t of "it" as separate, distinct consonants rather than letting them merge into the surrounding vowels.

Why: Korean speakers often pronounce English consonant clusters and word-final sounds with more separation than natural English rhythm allows.

Fix: Let the l and the flapped t act as bridges between the vowels rather than as standalone endings: "fi-li-din" [ˈfɪlɪˈɾɪn].

Chinese speakers

Mistake: Treating "fill", "it", and "in" as three evenly stressed, separated beats.

Why: Mandarin's syllable-timed rhythm gives each syllable roughly equal weight and clear boundaries, unlike English's flowing, stress-timed linking.

Fix: Compress the three words into a single rhythmic phrase with one main stress on "fill": [ˈfɪlɪˈɾɪn], letting "it" reduce almost to a beat between the other two.

Similar phrase patterns

put it on — chained linking with a flapped t across three words: The identical three-word linking chain — final consonant links to "it", and the flapped t of "it" links onward to the next word — applied to a different phrasal verb.
look it up — chained linking across three short words: Another common phrasal verb built the same way: object pronoun "it" sandwiched between a verb and a particle, all linked into one smooth phrase.
check it — a final consonant links onto "it": The simpler two-word version of the same linking building block used inside "fill it in".

Practice sentences

Please fill it in before Friday. (form instructions)
Can you fill it in for me? (asking for help)
I need to fill it in with a black pen. (office task)
Don't forget to fill it in on both sides. (detailed instructions)
She filled it in without any mistakes. (past tense narration)

Notes

"Fill it in" is a three-word phrasal verb that showcases chained linking, where connected speech reductions stack across more than one word boundary at once. First, the l at the end of "fill" links directly onto the vowel of "it". Second, the t inside "it" — sitting between two vowels — becomes a quick flap [ɾ] in General American speech, linking onward into "in": the whole phrase collapses into [ˈfɪlɪˈɾɪn], often heard casually as "fill-it-in" pronounced almost like one word. In RP, the t stays a light, unflapped tap rather than a full American flap, but the linking itself works the same way. Learners who pause at each word boundary end up producing three isolated, choppy syllables instead of one flowing phrase, which is one of the most common markers of a non-native rhythm in English. Because "it" so frequently appears as the squeezed middle word in phrasal verbs — "take it off", "turn it on", "work it out" — this chained linking pattern is worth practicing as a reusable template, not just memorizing for this one phrase.