theyvsthisWhat's the difference?

Quick tell: they is a pronoun, this is a determiner, so they fill different roles in a sentence.

Which to use

“they” is a pronoun and “this” is a determiner - they look or sound alike but fill different roles in a sentence.

#35
“they” frequency rank
#15
“this” frequency rank
50
confusion score

Side-by-Side Comparison

Feature they this
Definition A group of entities previously mentioned. The (thing) here (used in indicating something or someone nearby).

Where the eye mixes they and this

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
they
4 ch
this

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: they is /ˈðeɪ̯/ while this is /ðɪs/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (pronoun vs determiner), which is usually the fastest check. Our composite confusion score for this pair is 50, derived from the frequency rank of both members and their visual similarity.

they is recorded at frequency rank #35, classified as apron, pronounced /ˈðeɪ̯/. this is at rank #15, tagged as adet, pronounced /ðɪs/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 50, this pair ranks #529,957 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of they vs this

Shared letters: ht. Private to "they": ey. Private to "this": is.

"they" · 4 letters · shape CCVV  ·  "this" · 4 letters · shape CCVC

Known mistypes of this pair

  • theyhtey · tehy · theyy · thhey · thye · tthey
  • thishtis · thhis · thiss · thsi · tihs · tthis

Frequently Asked Questions

Can "they" and "this" be used interchangeably?
No - they are not even the same part of speech. "they" is a pronoun and "this" a determiner, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "they" or "this"?
"this" is the more common of the two: it sits at frequency rank #15 in our English list, against #35 for "they". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list