Not every error needs the same cure. A slip needs you to slow down and check.
A gap needs you to learn something. If you treat a gap as a slip, you will keep checking and keep missing it. If you treat a slip as a gap, you waste time revising rules you already know.
This lesson gives you a quick test. It sits inside spelling, punctuation and proofreading between the two earlier skills and the proofreading routine.
How do you tell which one it is?
Ask two questions about each error in your own writing.
- Can I correct it straight away when someone points at it? If yes, it is probably a slip.
- Would I write it the same way again? If yes, it is probably a gap, even if you can guess the right form when pushed.
Two further clues help. If the same word appears spelt two different ways in one piece, at least one is a slip. If the same error appears in every piece you write, it is a gap.
Worked example
A student wrote this and then tested each error with the two questions.
Thier team recieved the trophy on Friday. Everyone clapped and the the headmaster smiled. They were suprised by how loud the hall became.
| Error | Point at it: can I fix it? | Write it again: same way? | Verdict |
|---|---|---|---|
| Thier | Yes, “their” | Different next time | Slip (letters swapped) |
| recieved | Not sure which is right | Yes, same form | Gap (rule for ie and ei) |
| the the | Yes, delete one | Not repeated | Slip (repeated word) |
| suprised | Yes, it needs an r | Wrote “suprise” twice elsewhere | Gap (missing r in a less common letter string) |
What to do next. The slips go on the list of things your final check must catch: swapped letters and repeated words. The gaps go on a list to learn: “receive” follows “i before e except after c” in this case, and “surprise” has the letter r before the p.
Corrected: Their team received the trophy on Friday. Everyone clapped and the headmaster smiled. They were surprised by how loud the hall became.
The mistake to watch for
A common slip in the diagnosis itself is to say “I knew that, it was careless” about every error. This feels kind, but it hides gaps.
Mistaken claim: “I spelt ‘beleive’ wrong because I was rushing.”
If you would write “beleive” again next week, that is a gap. The test is what you would do next time, not how you feel about it now.
Check yourself
Classify each error as a slip or a gap and say what you would do.
1. A student writes “We goed to the market” and, when asked, says “goed” is correct.
Show answer
Gap. The student does not know the irregular past “went”. Action: learn the irregular forms and test them.
2. A student writes “She live in Penang” but corrects it to “lives” immediately when a line is drawn under it.
Show answer
Slip. The student knows the rule. Action: add an endings check to the final read.
3. A student spells “definately” in two emails and “definitely” once in a third.
Show answer
Probably a gap, with some uncertainty. Two wrong forms suggest the wrong form is the default. Action: write the correct word in three new sentences tomorrow and test again. If all three are right, call it a slip.
Where this leads next
With slips and gaps separated, you can build a routine: proofread one issue at a time. Keep the gaps in the mistake log and retest queue so they get retested later.
In online one-to-one English as a Second Language tuition, a teacher who sees your errors as they happen can decide quickly whether you need a rule or a routine.