教学目标：
1.语法目标：
1）Using the future tense to talk about future events;
2）Using modals to indicate preferences;
3）Using adverbs to express sequence of time;
4）Using adjectives to make comparisons;
5）Using the simple present tense to talk about present states;
2.能力目标：
1）Show agreement（同意）and disagreement（不同意）
-- Peter will possibly be a policeman.
-- Yes, I agree. /No, I don’t agree.
I think he’ll possibly be a fireman.
2）Show possibility（可能性）
-- I’ll possibly be a policeman or a fireman.
