Did + ... + teach/taught?
65879
Where did they go / do they went?
144385
Questions with and without auxiliary
48148
The + Possessive
62453
Does/do+personal pronoun+verb
96203
How does negation affect the use and understanding of "or" and "and"
2182
vs. . Which to use?
88776
"To do this" or "For doing this" to start explaining something?
21549
"With what [...]?" or "What [...] with?"
96571
Does the position of the * or & matters?
48018
"learn to" vs "learn how to" and "teach to" or "teach how to"
33742
Does using "did" to form the past tense make a difference?
61303
"Infer" vs. "imply" — can "infer" imply "imply"?
29914
What is the difference between  and ?
112507
Double preposition?
46644
Was or is? Confusion
41625
help you learn vs. help you to learn
73598
"Show," "shown," and "showed"