1、对……守信用
信仰；信念；信任；忠实 keep faith with 对……守信用；忠于信仰 It's not caused by us(that we caused it), but your company broke your faith with us.
2、忠于信仰
信仰；信念；信任；忠实 keep faith with 对……守信用；忠于信仰 It's not caused by us(that we caused it), but your company broke your faith with us.
3、对…守信用
...in (during) the course 在…过程中keep faith with 对…守信用absorb(=take up the attention of)吸引…的注意力(被动语态), 全然 ...
4、守信
... in faith where of 为了证实这件事的诚意, 为了对上述各项表示诚意(法律, 条约中用语) keep faith with 忠于信仰; 守信 lose faith in 失去对...的信念; 不再信任 ...