convenient
1.convenient是“使人感觉便利的”，不是“感觉便利的”，如可以说It is convenient for me to call on him，不可说I am convenient to call on him或I am convenient in calling on him。
2.比较下面四句：
- If it is convenient to（有时用for）you, please call at two o'clock.
- If it is convenient to（有时用for）you, I will call at two o'clock。
- I hope it will be convenient for（偶尔用to）you to call at two o'clock.
- I hope it will be convenient to you for me to call (on you) at two o'clock.
3.It will be convenient to know him可能有两个意思：“要认识他是不难的”或“认识了他将有所便利”。
4.不可说It will be convenient that I shall call at two o'clock，该说It will be convenient for me to call at two o'clock。
