Somebody was asking me about the difference between these two. We were talking about how people deal with cold weather.
× Cold weather becomes the demand for hot water bottles.
○ Cold weather increases the demand for hot water bottles.
○ Demand for hot water bottles becomes greater in cold weather.
○ Normally low demand becomes high demand in cold weather.
- hot water bottle 湯たんぽ (definition from Weblio)
- increase (数量・程度などが)ふえる,増加する (definition from Weblio)
- become〈…に〉なる (definition from Weblio)
× The crisis will increase more severe. <- a "crisis" is not a number
○ The crisis will become more severe.
○ A less-serious situation becomes a severe crisis.
○ The severity of the crisis will increase. <- "severity" can be ranked on a numeric scale
- crisis 危機,決定的段階,重大局面 (definition from Weblio)
- severe ひどい,猛烈な (definition from Weblio)
- severity 重症度 (definition from Weblio)