1. CAN
1.1. IT EXPRESS HABILITIES OR POSSIBILITIES
1.1.1. AFFIRMATIVE FORM
1.1.1.1. SUBJECT + CAN + VERB
1.1.1.1.1. I CAN PLAY VIDEOGAMES
1.1.2. NEGATIVE FORM
1.1.2.1. SUBJECT + CAN NOT/CAN'T + VERB
1.1.2.1.1. I CAN'T PLAY VIDEOGAMES
1.1.3. QUESTION FORM
1.1.3.1. CAN + SUBJECT + VERB + ?
1.1.3.1.1. CAN I PLAY VIDEO GAMES?
1.1.4. ANSWER
1.1.4.1. YES + SUBJECT + CAN
1.1.4.1.1. YES, YOU CAN PLAY VIDEOGAMES
1.1.4.2. NO + SUBJECT + CAN NOT/CAN'T
1.1.4.2.1. NO, YOU CAN'T PLAY VIDEOGAMES
2. COULD
2.1. IS THE PAST OF CAN. YOU CAN USE THIS ONE TO ASK FOR SOMETHING, BUT MORE FORMAL.
2.1.1. AFFIRMATIVE FORM
2.1.1.1. SUBJECT + COULD + VERB
2.1.1.1.1. YOU COULD DANCE WHEN YOU HAD TIME
2.1.2. NEGATIVE FORM
2.1.2.1. SUBJECT + COULD NOT/ COULDN'T + VERB
2.1.2.1.1. YOU COULDN'T DANCE WHEN YOU HAD TIME
2.1.3. QUESTION FORM
2.1.3.1. COULD + SUBJECT + VERB + ?
2.1.3.1.1. COULD YOU TEACH ME HOW TO DANCE?
2.1.4. ANSWER FORM
2.1.4.1. YES + SUBJECT + COULD
2.1.4.1.1. YES, I COULD TEACH YOU.
2.1.4.2. NO, SUBJECT + COULD NOT
2.1.4.2.1. NO, I COULDN'T.
3. MAY
3.1. WE USE IT TO SAY SOMETHING THAT IS VERY POSSIBLE OR SOMETHING THAT IS SURE TO HAPPEN
3.1.1. AFFIRMATIVE FORM
3.1.1.1. SUBJECT + MAY + VERB
3.1.1.1.1. I MAY PREPARE A PIE FOR DINNER
3.1.2. NEGATIVE FORM
3.1.2.1. SUBJECT + MAY + NOT
3.1.2.1.1. I MAY NOT PREPARE A PIE FOR DINNER
3.1.3. QUESTION FORM
3.1.3.1. MAY + SUBJECT + VERB + ?
3.1.3.1.1. MAY I PREPARE A PIE FOR DINNER?
3.1.4. ANSWER FORM
3.1.4.1. YES + SUBJECT + MAY
3.1.4.1.1. YES, YOU MAY
4. MIGHT
4.1. IS THE PAST OF MAY. WE CAN USE THIS TO EXPRESS AN EVENTUALLITY WITH MORE ODDS
4.1.1. AFFIRMATIVE FORM
4.1.1.1. SUBJECT + MIGHT + VERB
4.1.1.1.1. CAREFUL. YOU MIGHT FALL FROM THAT TREE
4.1.2. NEGATIVE FORM
4.1.2.1. SUBJECT + MIGHT NOT/MIGHTN'T
4.1.2.1.1. THIS MIGHT NOT BE A PROBLEM
5. MUST
5.1. WE USE THIS TO EXPRESS SOMETHING THAT MUST BE DONE, IN A MANDATORY WAY
5.1.1. AFFIRMATIVE FORM
5.1.1.1. SUBJECT + MUST + VERB
5.1.2. NEGATIVE FORM
5.1.2.1. SUBJECT + MUST NOT/MUSTN'T + VERB
5.1.3. QUESTION FORM
5.1.3.1. MUST + SUBJECT + VERB + ?
5.1.4. ANSWER FORM
5.1.4.1. YES + SUBJECT + MUST
5.1.4.1.1. YES, YOU MUST
5.1.4.2. NO + SUBJECT + MUST NOT/MUSTN'T
5.1.4.2.1. NO, YOU MUST NOT
6. HAVE TO
6.1. WE USE THIS TO EXPRESS SOMETHING THAT IS NECESSARY
6.1.1. AFFIRMATIVE FORM
6.1.1.1. SUBJECT + HAVE TO + VERB
6.1.1.1.1. I HAVE TO TRAVEL TO ANOTHER COUNTRY
6.1.2. NEGATIVE FORM
6.1.2.1. SUBJECT + DON'T HAVE TO + VERB
6.1.2.1.1. I DON'T HAVE TO TRAVEL TO ANOTHE COUNTRY
6.1.3. QUESTION FORM
6.1.3.1. DO + SUBJECT + HAVE TO +VERB + ?
6.1.3.1.1. DO I HAVE TO TRAVEL TO ANOTHER COUNTRY?
6.1.4. ANSWER FORM
6.1.4.1. YES + SUBJECT + DO/DOES
6.1.4.1.1. YES, YOU HAVE TO
6.1.4.2. NO + SUBJECT + DON'T/DOESN'T
6.1.4.2.1. NO, YOU DON'T HAVE TO
7. OUGHT TO
7.1. WE USE THIS TO EXPECT SOMETHING TO HAPPEN
7.1.1. AFFIRMATIVE FORM
7.1.1.1. SUBJECT + OUGHT + VERB
7.1.1.1.1. I OUGHT STUDY FOR THE TEST
7.1.2. NEGATIVE FORM
7.1.2.1. SUBJECT + OUGHT NOT/OUGHTN'T + VERB
7.1.2.1.1. I OUGHT NOT STUDY FOR THE TEST
7.1.3. QUESTION FORM
7.1.3.1. OUGHT + SUBJECT + VERB + ?
7.1.3.1.1. OUGHT I STUDY FOR THE TEST?
7.1.4. ANSWER FORM
7.1.4.1. YES + SUBJECT + OUGHT
7.1.4.1.1. YES, YOU OUGHT
7.1.4.2. NO + SUBJECT + OUGHTN'T
7.1.4.2.1. NO, YOU OUGHTN'T