for long造句用for long 造句

I haven't been learning French for long,so I can only speak a few words.
我学法语的时间还不长,所以我只能凑合著说几句.
Nothing engages his attention for long.
什麽事都无法使他长时间精神集中.
He finds it difficult to stay on/stick to the straight and narrow for long.
他觉得长期地坚持走正道很难.