Hi! Sorry for re-opening this post after more than a year.
Schapers was, I think, doing an Online TEFL course and got to the part where correcting students in an appropriate manner is being tested. Of course the mistakes are obvious, but the question was not "what's wrong with these sentences".
For each sentence, 3 things need to be identified:
1. What caused the error? A slip of the tongue, misuse of learned grammar, mother tongue influence, etc.
2. What type of error is it? Grammar, spelling, vocabulary, etc.
3. How would you correct it? Repeat the sentence up to the point of the error, have the student try again, looking puzzled, etc.
I'm going to try it myself, though I did want to see how others looked upon these problems and perhaps get some inspiration. ;) Anyway, that's how I got here. And, of course, I'm still curious about what you think.
Added: My apologies again, I know I re-opened a very old thread which, as I can see from the current layout and policy, has been mistitled and placed in the wrong forum (the teacher's forum would've been a better place IMO). Also, please know that I'm not asking for answers to my homework, I have already submitted my answers at this time. I'm just curious about what other people's views are.
 I walk-id to school today.
Point 1: The error is not an L1 (mother tongue) interference.
Point 2: The learner mispronounces the verb walked.
Point 3: The assumption that -ed is pronounced [Id].
Point 4: Introduce the learner to the morphophonemes [t], said after voiceless sounds (e.g., walk[t], push[t]), [Id], said after [t] or [d] sounds (hat[Id], end[Id]), and [d] elsewhere (e.g., answer[d], call[d]). Read more here ...
 I'd like to make a photo.
Point 1: That particular error is usually attributed to L1 interference.
Point 2: The learner uses make instead of take.
Point 3: Vocabulary.
Point 4: Collocations and explain the semantics of make and take (e.g., to make is to create; to take, in example , is to obtain, which is why this phrase get/grab a photo, e.g. I'd like to get/grab a photo expresses the same meaning as take a photo. Cf. I'm going to take a shower ~ I'm going to grab a shower, but not *I'm going to get a shower. Collocations.)
 He's a friendly girl.
Point 1: The error can be attributed to L1 interference.
Point 2: The learner uses the wrong pronoun, he instead of she.
Point 3: Two possible causes. The learner's L1 doesn't make a distinction between male and female pronouns or the pronunciation of /h/ and /sh/ before high front vowel [i:] is not phonemic / not distinctive in the learner's L1.
Point 4: Activities that focus on pronunication (minimal pairs) and/or vocabulary (gender specific pronouns and nouns).
 What do you eat for dinner yesterday.
Point 1: The error could be attributed to L1 interference.
Point 2: The learner used the wrong tense, present do instead of past did.
Point 3: Possibly, that adverbs carry tense, not verbs. (In some languages, adverbs (e.g., yesterday), not the verb, express time.)
Point 4: Activities that focus on verb tense and adverbs.