will 「今決めたこと, まだ決まっていないこと」
I'll play tennis tomorrow.
I’ll call you back later.
Maybe he'll come.
× I'll work tomorrow.
進行形 「決まっている未来のこと」
I'm playing tennis tomorrow.
I'm working tomorrow.
I'm getting married next year.
× I'm calling you back later.
be going to 「いつでも使える唯一の未来形」
I'm going to play tennis tomorrow.
○ I'm going to call you back later.
○ Maybe he is going to come.
○ I'm going to work tomorrow.
複文の場合
× I'm glad he will come tomorrow.
○ I'm glad he is coming tomorrow.
○ I'm glad he is going to come tomorrow.
× I'm worried I will get lost tomorrow.
○ I'm worried I'm getting lost tomorrow.
○ I'm worried I'm going to get lost tomorrow.
近い未来・遠い未来は関係ない
○ I'm getting married next year.
× I'm calling you back in 5 minutes.
× I will work tomorrow.
ニック先生の説明非常にわかりやすいです。オススメです。
