In this task, you will be shown a correct English sentence. You need to generate an incorrect form of the input sentence.
One example: Students shouldn't work multiple full-time jobs.
Solution is here: Student's shouldn't work many full-time jobs.
Explanation: The possessive form is not correct in this instance and many should be multiple.

Now, solve this: For example , when we talk about speed , they must understand why it is dangerous ; it is better than learning after they have an accident . 
Solution:
for example when we talk about speed they must anderstand why it is dengures is beteer than if they have axcedant after that they learn . 