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 A. Adjectives used with infinitives only I am glad to meet you again They're eager to go to the beach I was delighted to hear the good news about your scholarship. Other adjectives : disappointed, happy, pleased, sad, sorry, surprised B. Adjectives used with infinitives or gerunds it + be+ Adj (nice, difficult etc) + (to inf / gerund)  ---> with little difference in meaning It was really nice to talk to Mrs Anna It was really nice talking to Mrs Anna Mrs Anna was really nice to talk to. Other adj used like this include : easy, exiting, great, hard, impossible, interesting After an adj such as anxious, we can use an infinitive or a preposition + gerund with different meaning. I was anxious to leave (I was eager) I was anxious about leaving (I was worried) Source : Yule, George. 2023. Advanced Oxford Practice Grammar with Answer. Oxford : Oxford University Press. Reference :

 Sufficiency The adverbs enough and enough usually take a postmodifier position e.g.       Is that music loud enough ?               The shoes are not big enough Adj + enough + PP                    Is the water hot enough for you ? Adj + enough + to-inf cl            Is the water hot enough to take a bath ? Adj + enough + PP +to-inf cl    Is the water hot enough  for you   to take a bath  ? Note : When enough functions as an adjective, it can come before the noun e.g.         Did he give us enough time ? Enough + Noun + to inf        We have got enough money to buy a new car Enough + Noun + for + indirect object + to inf  The is not enough time for them to finish the test papers Excess The adverb too comes before adjectives and other...